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May 3, 2016

# Search: Calculate the pH after naoh is added

Number of results: 51,558

ap chemistry
please explain titration problems. I'm a total noob at this and am trying to answer some prelab questions. Examples: 1. How many mL of a 0.800 M NaOH solution is needed to just neutralize 40 mL of a 0.600 M HCl solution? 2. You wish to determine the molarity of a solution of ...
October 2, 2008 by chris

Chemistry
Titration of 50.0 ml of acetic acid reaches equivalence after delivery of 22.5 ml of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH after addition of 20.0 ml of NaOH? ...
April 14, 2014 by Sam

Org. Chem.
what is the precipitate formed when HCl is added? I believe the answer is NaCl, but I am not sure and this precipitate only formed in the first NaOH extract, as precipitate was essentially nonexistent in the 2nd extract? Below is what was done in the experiment. Also, does the...
September 21, 2009 by CM

chemistry
calculate the Ph of 0.3 M sodium propanoate, Ka 2.0 x 10 base -3. then calculate the pH after 0.03 mol NCL is added to 2L of the first solution.
July 20, 2013 by Mandy

Chemistry
You added how may mols NaOH? That's M x L = mols. What final volume do you have. You added 18.01 mL and 10 mL so total volume is 28.01 mL. Convert that to L., then M = mols/L Do I do 0.1M x .01801L = 0.001801mols? Then do M = 0.001801mols/0.02801L? I'm a little confused ...
April 25, 2014 by Jay

Chemistry
A sample of 9.4 grams of NaOH is dissolved into 693 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.37 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...
October 11, 2010 by May

Chemistry
if you have 100mL of 0.1M acetic acid (ka = 1.8x10(-5)what is the pH after 10mL NaOH is added? I came up with an answer of 2.895, but i'm not sure if its right.
October 26, 2011 by Kevin

ap chem
A sample of 7.45 grams of NaOH is dissolved into 609 mL of aqueous 0.250 M NaOH (as-sume no volume change). This solution is then poured into 2.18 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...
September 16, 2012 by cheri

chemistry
A sample of 6.65 grams of NaOH is dissolved into 621 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 2.16 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...
December 18, 2012 by lauren

chemistry
Calculate the volume of NaOH 0.1M that needs to be calculated to be added to a 30ml o-phosphoric acid 0.1 in order to prepare solutions of pH 7.5 and pH 6.9? pKa3= 2.15; pKa2=7.2; pKa1 = 12.1

Chemistry
If 25mL of 2.00M NAOH is added tpo 50mL of 0.10M HC2H3O2 (Ka=1.8*10^-5), what is the pH? moles HC2H3O2= c*v = .1 * .05L = .005 moles NaOH= c*v = .2 * .025L = .005 pH= Pka + log (B/A) = 4.75 + log (.005/.005) = 4.75 I'm not sure how to calculate the moles I know i'm making a ...
August 10, 2009 by Sara

science-chemistry
We performed a titration with NaOH solution with KHP. Now I need to calculate the average molarity of NaOH based on this data Weight of khp= 0.1083 g Volume of naoh = 6.4 ml Then if i get this how do i get the molarity of ch3cooh totrated in naoh with the data Volume of ...
April 23, 2014 by cassy

AP Chemsitry
A solution of an unknown monoprotic weak acid was titrated with 0.100 M NaOH. The equivalence point was reached when 37.48 ML of base had been added. From a second buret, exactly 18.74 of 0.100 M HCl were added to the titration solution. The pH was then measured with a pH ...
April 1, 2012 by Keith

Chemistry
If 100ml of 1M NaOH solution is added to water make a solution of 1.5L, calculate its normality
April 12, 2016 by Avinash

Chemistry
A 0.355 g sample of a solid, monoprotic acid having a molar mass of 121 g/mol requires 18.47 mL NaOH for neutralization. Calculate the molarity of the NaOH solution. I got 0.159 M NaOH
July 11, 2013 by <3

Chemistry
Calculate the volume of .100M NaOH that must be added to reach ph of 3 in the titration of 25.00 mL of .100M HCl
February 26, 2014 by Chemist in progress

Chemistry
when 6 M NaOH is slowly added to a solution containing chromium (III) ion, a precipate forms. However when an excess of 6 M NaOH is added, the precipated dissolves forming a complex ion with a coordination number of four. 1) write the formula of the precipitate. 2) write the ...
February 17, 2011 by lillian

chemistry
What volume of WATER MUST BE ADDED to 10.0 mL of 6.0 M NaOH to make a solution that is 0.30 M in NaOH? Assume that the volumes are additive. a. 10 mL b. 190 mL c. 200 mL d. 210 mL e. 500 mL
March 29, 2010 by lawrence

Chemistry
Use the dilution relationship (Mi x Vi = Mf x Vf) to calculate the volume of 0.500 M NaOH needed to prepare 500 mL of .250 M NaOH. This is my work ? L Solution = 500mL x (1L/1000mL) = .500L ? mol NaOH = .500 L Solution x (0.250 M NaOH/1 L Solution) = .125 mol NaOH ? L solution...
February 28, 2009 by Bob

chemistry
A 0.5130 g aspirin tablet which was dissolved in 95 percent ethanol required 27.98 mL of 0.1000 M NaOH for neutralization. Then an additional 42.78 mL of 0.1000 M NaOH was added and the soln was heated to hydrolyze the aceytlsalicyclic acid. After the reaction mixture was ...
January 12, 2011 by kelis

Chemistry
A buffer containing 0.2832 M of acid, HA, and 0.1504 M of its conjugate base, A−, has a pH of 2.36. What is the pH after 0.0015 mol NaOH is added to 0.5000 L of this solution?
March 16, 2012 by Tracey

chemistry
I completely understand Le Chateliers principle but I have no idea about these questions. They're due tomorrow so fast help would be appreciated. Why did adding water to the equilibrium involving CoCl_4_^2-^ cause the color to change? Use Le Chateliers principle to explain the...
December 1, 2010 by k

Chem
A solution is made by dissolving 26.9 g of NaOH in approximately 450 mL of water in a volumetric flask. The solution becomes quite warm, but after it is allowed to return to room temperature, water is added to total 500 mL of solution. Calculate the pH of the final solution. ...
February 27, 2013 by Anonymous

chemistry
In the lab, 20.0 g of sodium hydroxide is added to a beaker giving it a total mass of 128.4 g. Sulfuric acid is added until all of the sodium hydroxide reacts. After heating, the total mass of the beaker and the dry compound is 142.3 g. Caculate the percent yeild. 2NaOH + ...
June 13, 2007 by jill

chemistry
what is the pH of a solution containing 25 ml of 0.10M acetic acid after 10 ml of 0.10M NaOH is added?
August 8, 2010 by thimmaiah

chemistry
Calculate the Molarity of the unknown acid if 25.0 mL of the acid reacts with 17.50 mL of 0.14 M NaOH solution. Assume that NaOH and acid react in 1:! ratio. Show your work. (Hint: Find the moles of NaOH from the given molarity and volume. mols of NaOH = mols of acid. Knowing ...
March 16, 2016 by shosho

Chemistry
For 105ml of a buffer that is .40 M in HOCL and .36M in NaOCL what is the pH after 13.4 ml of 1.5M NaOH is added? Ka for HOCL is 3.5x10^-8
June 12, 2012 by Andrew

chemistry
A student prepares a solution of hydrochloric acid that is approximately 0.1 M and wanted to determine its precise concentration. A 25.00 mL portion of the HCl solution is transferred to a flask, and after a few drops of indicator are added, the HCl solution is titrated with 0...
June 14, 2015 by walter

chemistry
Hi, I posted this question earlier but still need some help: 1.3188g of antacid is weighed and mixed with 75.00mL of excess 0.1746 M HCl. The excess acid required 27.20 mL of 0.09767 M NaOH for back titration. Calculate the neutralizing power of the antacid in terms of mmol H...
October 5, 2010 by Serenity

Chemistry-Dr.Bob222
A 1.00 L buffer solution is 0.250 M in HC2H3O2 and 0.250 M in NaC2H3O2. Calculate the pH of the solution after the addition of 0.150 mol of solid NaOH. Assume no volume change upon the Additon o f NaOH. The Ka value for HC2H3O2 at 25 C is 1.8 x 10^-5.
April 29, 2016 by Nevaeh

chem equilibrium
Determine the pH of a buffer that is prepared by mixing 100 mL of 0.2 M NaOH and 150 mL of 0.4 M acetic acid assuming the volume is additive. Calculate the pH of the solution when 0.5 mL of 1 M of HCl was added hence calculate the buffer capacity.(Given:pKa of acetic acid = 4....
December 15, 2015 by John

Chemistry
A sample of 9.4 grams of NaOH is dissolved into 693 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.37 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...
October 4, 2010 by May

Chemistry
A sample of 6.41 grams of NaOH is dissolved into 675 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.28 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...
March 22, 2011 by Scott

Chemistry
A sample of 5.61 grams of NaOH is dissolved into 627 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.16 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...
November 23, 2015 by Anonymous

Chemistry
a 15.00mL sample of NaOH was titrated to the stoichiometric point with 17.40mL of 0.2340M HCl. a) what is the molar concentration of the NaOH solution? b)calculate the grams of NaOH in the solution.
December 9, 2010 by prince

chemistry
HCL is tritrated with NaOH. KHP is then added. A possible source of systematic error in this experiment is failure to dry the KHP. If this occured, would the final wt% NA2CO3 be falsely high, falsely low, or unaffected. Give reasoning. Thanks. You have left out much of the ...
September 6, 2006 by bria

math
50gm of a sample of ca(oh)s is dissolved in 50ml of 0.5N hcl solution. The excess of hcl was titrated with 0.3N -naoh. The volume of naoh used was 20cc. Calculate of naoh used was 20cc. Calculate % purity ca(oh)2 Who help me step by step
December 22, 2013 by Fai

Chemistry
1.What is the pH of a solution containing 0.042 M NaH2PO4 and 0.058 M Na2HPO4 ? The pKa of sodium phosphate is 6.86. pH = 6.86 + log [0.058] / [0.042]; pH = 6.86 + 0.14; pH = 7.00 That is my answer to the above question. The following question is what I am having trouble with...
January 27, 2013 by Blake

This is the second reaction: HCl(aq)+NaOH(aq)-->NaCl(aq)+H2O(l) (Heat of neutralization) This reaction involves mixing two solutions: 1.00 mol/L NaOH and 1.00 mol/L HCl. Trial 1: 48.0 mL of the NaOH solution is mixed with 47.5 mL of the HCl. The temperature rises from 22.00...
January 1, 2012 by tessa

Chemistry
A sample of 8 grams of NaOH is dissolved into 599 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.68 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the ﬁnal solution? ...
May 13, 2014 by Susan

science
A sample of 8 grams of NaOH is dissolved into 599 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.68 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the ﬁnal solution? ...
May 13, 2014 by Susan

AP Chemistry
(a) What is the pH of a 2.0 molar solution of acetic acid. Ka of acetic acid = 1.8 x 10¯5 (b) A buffer solution is prepared by adding 0.10 liter of 2.0 molar acetic acid solution to 0.1 liter of a 1.0 molar sodium hydroxide solution. Compute the hydrogen ion concentration of ...
February 13, 2007 by Dave

Chemistry
500.0mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200mol/L NaOH(aq).Both solutions had a density of 1.000g/mL & a specific heat of 4.184 J/g.K. The calorimeter had a heat capacity of 850.0 J/degree C. The temperature of ...
March 23, 2012 by Meenaakshi

Chemistry Titration Lab
Calculate the theoretical pH after 2.50 mL and 9.50 mL of NaOH has been added in both the titration of HCl and of HC2H3O2. Given: Molarity of all chemicals are 0.1 M HCl and HC2H3O2 are 8ml prepared in 100ml water. Im guessing I need to make and ICE chart but I'm having ...
May 5, 2011 by Kim

chemistry
A definite amount of NH4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who helps
February 10, 2013 by Fai

chemistry
A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl takedn The answer 3.78g who helps
February 10, 2013 by Fai

Chemistry
1.What mass of NaOH(s) must be added to 300 mL of HCl 0.25 M in order to completely neutralize this acid? 2.During a lab, you mix 2 solutions: a 100 ml solution containing 0.40 g of NaOH and a 100 mL solution containing 0.73 g of HCl. What is the concentration of H+ ions in ...
May 9, 2013 by Talulla

chemistry
Calculate the amount of NaOH in this solution 5.00mL of 12.0 NaOH is diluted with water to make 24 mL of 2.50 NaOH solution
April 24, 2012 by crystal

Chemistry
In this experiment NaOH is standardized to titrate it with vinegar so thtat the percent by mass of the acetic acid can be determined. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution's concentration? How is the term acid ...
March 29, 2014 by Sandy

Chemistry
This is a lab I have, but have no clue what to do. Please do out the steps so i can understand. Reactions and Data: NaOH(s)--> Na1+(aq)+ OH1-(aq) (Heat of solution of NaOH) This reaction involves adding solid NaOH to water and watching the temperature change as it dissolves...
December 31, 2011 by Carrie

Chemistry
You are asked to prepare 500. mL of a 0.150 M acetate buffer at pH 5.00 using only pure acetic acid, 3.00 M NaOH, and water. Calculate the quantities needed for each of the following steps in the buffer preparation. 1. Add acetic acid to ~400 mL of water in a 500 mL beaker. ...
September 28, 2012 by Kw1h

college chemistry
When a solution containing 8.00 g NaOH in 50.0 g of water at 25 °C is added to a solution of 8.00 g of HCl in 250.0 g of water at 25 °C in a calorimeter, the temperature of the solution increases to 33.5 °C. Assuming that the specific heat heat of the solution is 4.184 J/(g&#...
June 23, 2015 by Karla

Chemistry
When 50.0ml of 1.00M HCl is titrated with 1.00M NaOH, the pH increases. calculate the difference in pH of the system when you add 49.99ml NaOH and 50.01ml of NaOH. Please work out detailed steps.
March 29, 2013 by Grace

acid-base titrations
For each of the following circumstances, indicate whether the calculated molarity of NaOH would be lower, higher or unaffected. Explain your answer in each case. a.the inside of the pipet used to transfer the standard HCI solution was wet with water. b.You added 40mL of water ...
April 21, 2008 by natash

Chemistry
In one trial of an investigation 50.0 mL of HCl(aq) of an unknown concentration is Tiresias with 0.10M NaOH (aq). During the titration the total volume of NaOH (aq) added and corresponding pH value of the reaction mixture are measured and recorded in the table below: 10mL-1....
April 14, 2011 by Kelly

Chemistry
23.55 ml of the NaOH were added to partially neutralize a new 25.00 ml sample of the acid. The pH of the mixture was measured as 5.33. Calculate Ka for the acid, HA, using the partial neutralization method
April 29, 2013 by GeeGee

Chemistry
The phosphoric acid in a 100.00 mL sample of a cola drink was titrated with 0.1476 M NaOH. The first equivalence point was detected after 13.32 mL of base added, and the second equivalence point after 28.65 mL. Calculate the concentration of H2PO4- in mol/L. (Hint: if only ...
January 29, 2010 by Jenna

Chemisty
Calculate the number of milliliters of 0.738 M NaOH required to precipitate all of the Mg2+ ions in 148 mL of 0.541 M MgSO4 solution as Mg(OH)2. The equation for the reaction is: MgSO4(aq) + 2 NaOH(aq) Mg(OH)2(s) + Na2SO4(aq) _____________mL NaOH
February 7, 2012 by Eliazbeth

Chemistry
What is the pH of 125 mL of a 1.59 M solution of a monoprotic weak acid, HA (Ka=9.53×10–5), after 29 mL of 0.37 M NaOH is added? I have no Idea how to start this problem and the homework is due tonight, could someone please help me in calculating this? Thanks
March 31, 2013 by Cory

chemistry
If it requires 30.0 milliliters of 1.2 molar HCl to neutralize 20.0 milliliters of NaOH, what is the concentration of the NaOH solution? Balanced equation: NaOH + HCl NaCl + H2O 0.60 M NaOH 0.80 M NaOH 1.3 M NaOH 1.8 M NaOH
June 22, 2011 by Magan

chemistry
A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reaction mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who helps me
February 10, 2013 by Fai

Chemistry
A solution of HCL (.1053 M) is added to a solution of NaOH (50.0 mL) It takes 28.31 mL if the acid to neutralize the base (naOH).
October 2, 2011 by Nola

Chemistry
A solution that contains 2.047 x 10^-1 M of acid, HA, and 1.808 x 10^-1 M of its conjugate base, A-, has a pH of 4.196. What is the pH after 1.629 x 10^-3 mol NaOH is added to 5.961 x 10^-1 L of this solution?
January 21, 2012 by Summer

Chemistry
I was doing a lab experiment: 1) I measured 2.02g of copper(II) sulphate pentahydrate 2) I dissolved the copper(II) sulphate pentahydrate in 10mL of distilled water 3) I added 2.0mL of concentrated HCl to the solution and mixed well 4) I added 0.25g on Aluminun foil to the ...
September 26, 2015 by Patrick

science
3ml of 2M NaOH is added to 27 ml of destilled water. what dilution is made? what is the concetration of Naoh in the dilution?
August 16, 2012 by alen

chemistry
Calculate the volume of concentrated NaOH solution (which contains 500.00g of NaOH per liter of solution) that you will need to make 1.00L of a 0.100M NaOH solution
October 28, 2014 by xx

Chemistry
With an equilibrium constant of k=1.3 if NaOH and MgCL2 are added in stoichiometric ratio and 1.2 mol of NaOH are present at equilibrium, how much precipitate is produced (in moles)?
April 5, 2016 by Bryce

Chemistry
Calculate the theoretical amount of .5M NaOH that it would take to neutralize approx. 2.0 g KHP. KHP is a monoprotic acid, the molar mass of KHP is 204.22 g/mol and the molar mass of NaOH is 40.00 g/mol. Answer in terms of mL. I converted g KHP to mols, then mols of KHP to ...

Chemistry
Why does the addition of 50ml of 0.5M NaOH to 50mL of 0.6M KOH cause the pH to decrease (aka more acidic)? Because you have reduced the (OH^-) of the 0.6 M KOH by adding an equal volume of 0.5 M NaOH 50 mL x 0.6 M KOH = 30 millimols. pH = 13.78 Adding 50 mL x 0.5 M NaOH = 25 ...
August 21, 2007 by Vic

Quantitive Analysis
Calculate the volume (in mL) of 0.170 M NaOH that must be added to 361 mL of 0.0491 M 3-(N-Morpholino)propanesulfonic acid (MOPS) to give the solution a pH of 7.55. The pKa of MOPS = 7.18.
October 18, 2015 by Amanda Getto

Chemistry
suppose you added 26.0 ml of 0.01 M NaOH to the solution, what is the molarity of excess NaOH in the mixture? what is the ph of this solution?
November 19, 2014 by Mollie

Chemistry
Sorry DrBob, it's me again! Here's the info: Antacid Brand: Life Concentration of HCl: 0.1845 M Concentration of NaOH: 0.1482 M Trial 1: 1.Mass of Table: 1.2173g 2.Volume of HCl added: 75.0 mL 3.Milliomoles of HCl added:(0.1845M x 75.0mL= 13.84 mmoles 4.Volume of NaOH used: 17...
October 18, 2010 by Akhed-To DrBob222

Chemistry
Hi, I posted yesterday with this lab question. "Calculate the molar amounts of NaOH used in the reaction with the HCl solution and with the HC2H3O2. I think I got the answer to that with the help that I received. I had 5 mL of HCl, and I was using .100 M NaOH, so I got 5x10-4 ...
April 22, 2007 by Rachel

chemistry
Mass of tablet is 1.3183g, concentration of HCl 0.1807M, concentration of NaOH 0.1481M, volume of NaOH used 20.36 ml then milimoles of HCl added ?, milimoles of NaOH used ?
October 15, 2011 by Anonymous

Chemistry
A 1.250 g mass of standard aspirin is dissolved in approximately 20 mL of 1 M NaOH. This solution is added to a 250-mL volumetric flask and diluted to the mark with DI water. How many grams per mL of aspirin are in the resulting solution? (Note that a 250-mL volumetric flask ...
January 26, 2014 by Anonymous

Chem
What is the pH of the resulting solution if 30.00 mL of 0.100M acetic acid is added to 10.00mL of 0.100 M NaOH? For acetic acid, Ka=0.000018. I know that NaOH is a strong base and acetic acid is a weak acid. What is the equation: C6H5COOH+NaOH<--> C6H5COOH Once I get ...
February 27, 2008 by Sarah

college chem
A 0.1276 g sample of a monoprotic acid (molar mass = 1.10 x 10^2) was dissolved in 25.0 ml of water and titrated with 0.0633 M NaOH. After 10.0 ml of base has been added, the pH=5.47. What is the Ka for the acid?
March 28, 2011 by Angelina

Chemistry
What volume of 1.0 M NaOH must be added to 1.5 L of 1.20 M CH3COOH (ka=1.8x10^-5) to make the solution a buffer for pH 4.50? I do not understand how to determine the mols of NaOH. I tried to use the equation where: [H3O+] = ka (nHA/nA-) but it is not giving me the correct ...
April 10, 2016 by Charles

Calculus
Twins, Pierre and Francesca were each given 100 dollars on their 15th bday. they immediately put ther money into their individual money boxes. Each week throughout the next year they added a portion of their weekly pocket money. Puerre added 10 each week. Francesca added 50 ...
January 22, 2008 by Daisy

Chemistry
I was doing a lab experiment on the reaction of copper(II) sulphate and aluminum: 1) I measured 2.02g of copper(II) sulphate pentahydrate 2) I dissolved the copper(II) sulphate pentahydrate in 10mL of distilled water 3) I added 2.0mL of concentrated HCl to the solution and ...
September 26, 2015 by Patrick

chemistry
Consider the reaction HCl + NaOH ->NaCl + H2O Given: HCl Solution: 22 degrees celsius NaOH Solution: 22 degrees celsius Final Temperature: 26.1 degrees celsius A. Calculate the amount of heat evolved when 15 mL of 1.0 M HCl was mixed with 35 mL of 1.0 M NaOH B. Calculate ...
March 28, 2011 by Vanessa

Chemistry II
Calculate the change in heat: 2 Na(s) + 2 H2O(l) > 2 NaOH(aq) + H2(g) So far this is what I have: 2 H20 --> 2 H2 + O2 2(285.83) kJ 2 Na + O2 + H2 --> 2 NaOH 2(-426.73) kJ 2 Na + 2 H2O --> 2 NaOH + H2 -281.8 kJ If this correct?? yes, correct, as best as I can tell.
May 20, 2007 by Jayd

High school
A 15.00ml of NaoH was titrated to the stoichiometric end point with 17.40ml of 0.23M HCL. What is the molarity of NaoH in the solution?. Calculate the mass of NaoH in 15.00ml solution.[H=1, Cl=35.5, Na=23,O=16].
August 25, 2015 by Favour

Chemistry
Sorry DrBob, it's me again! Here's the info: Antacid Brand: Life Concentration of HCl: 0.1845 M Concentration of NaOH: 0.1482 M Trial 1: 1.Mass of Table: 1.2173g 2.Volume of HCl added: 75.0 mL 3.Milliomoles of HCl added:(0.1845M x 75.0mL= 13.84 mmoles 4.Volume of NaOH used: 17...
October 19, 2010 by Akhed-To DrBob222

chem
Calculate the final concentration of a. 4.0 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0L b. Water is added to 0.35L of a 6.0M KOH solution to make 2.0L of a diluted KOH solution. c.A 20.0 mL sample of 8.0% (m/v)NaOH is diluted with water so ...
November 8, 2012 by tracy

chem
what will happen to bromothymol blue indicator: a.) after addition of HCl, how does it affects the equilibrium b.) after addition of NaOH, hoe does it affect the equilibrium c.) after re-addition of NaOH Rewrite the net equation for the equilibrium? is this an exothermic ...
November 26, 2012 by kacey12

Chemistry
Could someone please help me complete my lab experiment. Antacid Brand: Life Concentration of HCl: 0.1845 M Concentration of NaOH: 0.1482 M Trial 1: 1.Mass of Table: 1.2173g 2.Volume of HCl added: 75.0 mL 3.Milliomoles of HCl added:mmoles ? Help 4.Volume of NaOH used: 17.14 mL...
October 18, 2010 by Akhed

Chemistry
1.CALCULATE pH of 1.0 L 0.010 M ascetic acid and 0.50 L 0.010 M NaOH. 2. Calculate pH of 1.0 L 0.010 M NaOH and 0.500 L 0.010M HCl Buffer help?
March 15, 2012 by ALISON

Chemistry
50.0 mL of 0.116 M NaOH is titrated with 0.0750 M HCl. Calculate the pH after the addition of 5.0 mL volume of acid.
May 1, 2013 by Nathan

Science - chemistry
Calculate the volume of 0.05 M NaOH which must be added to 100 cm3 of 0.05 M methanoic acid to obtain a buffer of pH 4.23. (Ka for methanoic acid = 1.77 x 10-4)
June 6, 2014 by Teagan

chemistry
1)100ml sample of solution that is 0.2m in both Naf and Hf has 4.0 ml of 1.0m hcl added to it. calculate the ph change of this soultion .ka =7.2*10^-4 2)40 ml of 0.32m benzoic acid if titrated with 60 ml of 0.2 m naoh. clacilate the ph of the resulting solution at the ...
March 4, 2012 by Anonymous

chemsitry
1)100ml sample of solution that is 0.2M in both Naf and Hf has 4.0 ml of 1.0M hcl added to it. calculate the ph change of this soultion .ka =7.2*10^-4 2)40 ml of 0.32M benzoic acid if titrated with 60 ml of 0.2 M naoh. clacilate the ph of the resulting solution at the ...
March 4, 2012 by Anonymous

biology
suppose 23mL of NaOH was required. How much Carbonic Acid was neutralized? 1L of .01 NaOH contains ____ mol NaOH? lmL of .01 NaOH contains _____mol NaOH? 23mL of .01 NaOH contains _____ mol NaOH? 2 mol of NaOH react with 1 mol H2CO3 2.3 x 10^-4 mol of NaOH react with ____mol CO2
October 5, 2010 by Anonymous

chemistry
(Re-posting because no one was answering chemistry questions) if you have 100mL of 0.1M acetic acid (ka = 1.8x10(-5)what is the pH after 10mL NaOH is added? I came up with an answer of 2.895, but i'm not sure if its right.
October 27, 2011 by Kevin

chemistry
Could someone help me with this please? In chemistry, we did a lab in which he put brands of commerical vinegar in a microplate. We put in 10 drops of each vinegar in each plate thinger then we added 1 drop of phenolphthalein and then put in as many drops of NaOH as it took to...
May 14, 2007 by Jeffrey

Chemistry
A 1X Phosphate Buffered Saline solution was prepared by adding 1.44g of Na2HPO4 and 1.44g of H2PO4- to 800mL of water. Additional components were dissolved in the solution: 8g of NaCl, 0.2g of KCl and 0.24g KH2PO4. The resulting buffer solution had a pH of 7.2. a. Calculate ...
April 28, 2015 by Nicole

CHEMISTRY
200.0 ml of 0.5000 M acetic acid is added to 200.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid at 25 oC is 1.76 x 10-5. n(NH3COOH)=CxV=0.5x200/1000=0.1mol n(Naoh)=CxV=0.5x200/1000=0.1mol I have no idear of what to do after finding the number of moles
November 9, 2015 by BAFANA

chem
write an equation for which component of the phosphate buffer (H2PO4-/ HPO4^2-) reacts when HCl is added. Do the same for NaOH. I think that the H2PO4- will react with the NaOH but its only a guess and I'm confused as to how I would go about doing this.
January 29, 2012 by jean

Inorganic Chemistry
I messed up on my titration: filled part of the burette with a supersaturated solution of KHTar(2.073g...MM=188.18amu) dissolved in 150mL diH2O, instead of the 0.051M NaOH solution. I know it wasn't more than a few mL, but I noticed a huge difference in the volume of NaOH ...
July 14, 2011 by Christina (PLZ HELP!!)

chemistry
How many milliliters of a 0.250 M acetic acid solution must be added to 50.0 mL of a 0.750 M NaOH solution to produce a buffer solution with pH = 4.500 ? The pH is given by which we can calculate the concentration of [H+] How do we approach the problem from there?
April 22, 2015 by Anon