Search: calculate the molarity ofthe NaOH solution: mass of KHP 2.484 g;

Number of results: 68,487

Chem
I am doing a lab concerning pH... Why is it necessary to allow a mixture of 25mL of a 0.1M HCl solution with 20mL of a 0.08M NaOH solution to cool to room temperature? (I don't know if the actualy concentrations matter) Does it affect the pH? Yes, temperature affects the ...
Wednesday, March 7, 2007 at 10:14pm by Marisol

chem
The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 100.0 g of water to give a final volume 102 mL are would i just add both the grams and divide by 102 for molarity? and molalty i would just add the mass?
Friday, August 8, 2008 at 6:49pm by so

Chem 100L
I worked this for someone last night. mols oxalic acid = grams/molar mass. Use the coefficients in the balanced equation to convert mols H2C2O4 to mols NaOH. M NaOH = mols NaOH/L NaOH
Sunday, December 2, 2012 at 3:40pm by DrBob222

Chemistry
The definition of molarity is: molarity = # mols/L. You know molarity and you know L; calculate mols.
Sunday, March 9, 2008 at 9:29pm by DrBob222

chemistry
Calculate the number of moles for HCl in a 30mL sample of 0.1M HCl 30 x10^-3 L*(0.1M)=moles of HCl The number of moles of HCl/the molarity of NaOH will give you the volume needed in L. volume in L=moles of HCl/0.1 M NaOH *** Multiply the volume by 10^3 if you need to report ...
Tuesday, February 12, 2013 at 12:48pm by Devron

Chemistry
Hi DrBob, Sorry about that, I wasn't very clear! Can someone please help me complete these calculations for my lab; I am having some trouble. A. Standardization of Na2S2O3 -Mass of KIO3 in 100mL = 0.09600g -Calculate Molarity of KIO3= ? Please check: 0.09600g/(214.0g/mol)=...
Sunday, March 6, 2011 at 11:42pm by Bryant

chemistry
So what's the question? If you know the density of vinegar and its percent composition, why do you need to titrate it? And you need the molarity of the NaOH for the titration to mean anything? Perhaps its 0.1 M NaOH and you just omitted the M.
Wednesday, May 28, 2008 at 11:43am by DrBob222

chemisttry
how many ml of a 1 M NaOH solution do you need to add to a 250 ml flask and bring it to volume with deionized water to make a 0.12 M NaOH solution
Monday, April 23, 2012 at 8:35pm by william

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).
Sunday, October 2, 2011 at 11:52pm by Nola

Chemistry
Exactly 23.6 ml of a 0.131 N HCl solution was required for complete neutralization of 25.0 ml of an NaOH solution.What was normality of the NaOH?
Saturday, June 25, 2011 at 4:36am by Rajan Khare

Chemistry
25% is a lot of citric acid in lemonade, it is usually ca 5% or less. Start from a balanced equation: NaOH + 3-carboxy-3-hydroxypentanedioic acid -> 3-carboxy-3-hydroxypentanedioic acid, trisodium salt + H2O which you need to balance OK. Let us assume that the 25% is by...
Tuesday, November 9, 2010 at 6:59am by Dr Russ

chemistry
Use the Molarity Formula Molarity= moles/liters of solution Molarity= moles/0.050 Liters To find moles you have to find the moles of each sample of KBr. SO 1.00M KBR times .025liters =.025moles And then 0.800M KBR times .075liters=.060moles. Then you add the moles of both ...
Monday, August 29, 2011 at 5:47pm by Davis

chemistry
how do you find the mass solute(g), GFM(g/mole), moles of solute, volume of solution, and molarity of solution (M), of CaSO(4)? *how would i solve this set by set? * what are the formulas?
Monday, March 29, 2010 at 10:27pm by kelly

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. ...
Wednesday, February 27, 2013 at 9:02pm by Anonymous

chemistry
calculate the morality of THE H2SO4 solution for each of the three runs. do the three values agree closely together with each other. Part A. Titration 1 volume of unknown acid =20ml initial buret reading of NaOH =0.5 ml final buret reading of NaOH=10.0ml
Wednesday, October 17, 2012 at 1:26pm by ALECIA

chemistry
A student titrated 10.00mL aliquots of her unknown amino acid solution with standard 0.1521M NaOH and with 0.0986M HCl. Inflection points were determined in the graphs after 3.29mL of HCl and 18.61mL of NaOH were added. Calculate the concentration of the amino acid
Thursday, August 5, 2010 at 2:55am by Brandon

ap chemistry
mols = 4.50 g/molar mass molarity = moles/L of solution.
Wednesday, September 29, 2010 at 9:57pm by DrBob222

chemistry
Why is the 6M NaOH solution diluted before titrating the vinegar sample? How might your results be affected if you used the 6M solution rather than the 0.3M NaOH?
Wednesday, May 4, 2011 at 12:54pm by jan

Chemistry
Can someone please check to see if I am doing this correctly. Thank you :) Q) Calculate the new molarity of a 35mL sample of 0.450 M CaCl2 solution that is diluted with enough water to make 250 mL of solution. A) 0.450 m CaCl2 x 35mL/250mL = 0.063 mL diluted solution
Monday, April 1, 2013 at 5:21pm by Kishwa

chemistr
In scientific calculations, it is important to know how accurate you'd like your answers. If you see a number like 0.9864g/ml, it means 4 significant figures are expected, so you have to carry your calculations to at least 5 significant digits, and then round off to 4 for ...
Tuesday, December 25, 2012 at 12:31am by MathMate

college chemistry
Followed by the total volume. Calculate the molarity of this solution: 0.521 mol NaCl;125 mL
Monday, April 16, 2012 at 5:55pm by michelle

Chemistry
An excess of zinc metal is added to 50.0 mL of a 0.100 M AgNO3 solution in a constant-pressure calorimeter. Assuming that the density of the solution is the same as for water, calculate the mass of the solution.
Wednesday, June 30, 2010 at 4:34pm by Haley

Chemistry
How do we prepare 500mL of 0.5 percent w/v solution of NaOH if we have stock solution of 50 percent w/v NaOH on hand?
Friday, October 12, 2012 at 5:15pm by Stacy

chemistry
what is the new concentration of a NaOH solution that was made from 75 mL of a 5.5 M NaOH solution and diluted it to 250 mL?
Thursday, June 2, 2011 at 7:24pm by lexi

College Chemistry
"A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated cylinder to obtain...
Wednesday, October 20, 2010 at 10:49am by James

Chemistry
The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated ...
Wednesday, October 20, 2010 at 1:48am by James

chemistry
If 26.223 mL of potassium permanganate solution is required to titrate 1.041 g of ferrous ammonium sulfate hexahydrate, { FeSO4(NH4)2So46H2O }, calculate the molarity of the KMno4 solution. and the equation the lab gave me was Mn04(-) + 8H(+) + 5Fe(+2) ----> Mn(2+) + ...
Tuesday, March 11, 2008 at 4:16am by chris

Chemistry
Hello, I have a question that reads: Using the average molarity of your initial acetic acid solutions, the initial volumes, and the volume of NaOH added to reach the equivalence point, calculate the [C2H3O2-] concentration at the equivalence point. You should report 4 ...
Sunday, May 9, 2010 at 2:11am by Jens

chemistry
Calculate the pH of the resulting solution if 30.0 mL of 0.300 M HCl(aq) is added to (a) 35.0 mL of 0.300 M NaOH(aq). (b) 40.0 mL of 0.350 M NaOH(aq).
Tuesday, April 10, 2012 at 8:49pm by anon

Chemistry
Calculate the pH of the resulting solution if 21.0 mL of 0.210 M HCl(aq) is added to a) 26.0 mL of 0.210 M NaOH(aq) b) 31.0 mL of 0.260 M NaOH(aq)
Sunday, September 4, 2011 at 10:24pm by Ada

Chem
This is a buffer solution disguised so it's a little harder to recognize. mols NaOH = L x M = 0.01130 x 0.100 M = ?? mols HCl = L x M = 0.00800 x 0.100 M = ?? Since the equation for the strong base and strong base is 1:1; i.e., NaOH + HCl ==> NaCl + H2O Just ...
Monday, October 29, 2007 at 4:00am by DrBob222

chemistry
moles HCl initially = M x L. moles NaOH = M x L moles NaOH = moles HCl in excess. moles HCl initial - mols HCl excess = moles used by actacid. I'm confused by "express the volum of HCl solution in liters" but the information is above. If the answer is to be ...
Monday, April 19, 2010 at 2:03pm by DrBob222

chemistry characterization & analysis of aspirin
Aspirin is C9H8O4 and it has one acid H on it so I will rewrite it as HC9H7O4. HC9H7O4 + NaOH ==> NaC9H7O4 + H2O If you know the molarity of the NaOH and measure mL required for titration, then mol aspirin = M NaOH x L NaOH = mols NaOH = mols aspirin. You can see the ...
Tuesday, November 13, 2012 at 12:10am by DrBob222

Chemistry College
How much KHP is in samples 2 and 3? %KHP = (mL x M x mmolar mass/mass sample) You know mL NaOH, M NaOH, millimolar mass KHP is 0.20422; solve for %KHP. Then substitute %KHP and new mass of samples 2 and 3 and solve for mL NaOH.
Thursday, April 18, 2013 at 3:59am by DrBob222

Chemistry
I there, this is my lab worksheet, I am having trouble filling it out. Please help me with it. Expt #1- Molecular Weight of Unknown Acid Unknown Acid: #3 Mass of Unknown solid acid transferred:1.0g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of...
Monday, October 4, 2010 at 10:17pm by Steve

chm
Calculate the PH OF A SOLUTION prepared by mixing 15.0mL OF 0.50 M OF NaOH AND 30.0mL OF 0.50 M BENZOIC ACID SOLUTION?( Benzoicacid is monoprotic and its dissociation constant is 6.5*10^-5)
Wednesday, March 31, 2010 at 4:23pm by ami

College Chemistry
The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated ...
Tuesday, October 19, 2010 at 11:10pm by James

chemistry
Calculate the molarity of each. a. 1.50 mole of NaCl in 8.00 L of solution 0.188 M NaCl b. 270 mg of NaCl in 3.00 mL of solution 90 M NaCl
Wednesday, February 22, 2012 at 6:25pm by krystal

chemistry
The Beer-Lambert Law. A = abc. Use A = abc for the standard to calculate the constant, a (the absorptivity). b = cell length (but you don't need to use that IF both standard and unknown were measured using the same cell. Then use A= abc on the unknown to calculate FeSCN^+2...
Monday, April 14, 2008 at 1:56pm by DrBob222

Chemistry
Calculate the change in PH when 6 ml of 0.1 M HCl is added to 100 ml of a buffer solution that is 0.1 M in NH3 and 0.1 M in NH4Cl. And calculate the change in PH when 6 ml of 0.1 M NaOH is added to the original buffer solution.
Tuesday, March 27, 2012 at 6:01pm by Mima

chemistry
Draw the tritration curve for the neutralization of a 100ml sample of 1M solution of HCl with a .6M solution of Naoh point 1: 2 ml NaOH edded point 2: 40 ml NoOH ADDED POINT 3: EQUIVALENCE POINT 4: 80 ML NaOH added
Sunday, April 3, 2011 at 1:55pm by sam

chemistry
I need help solving this question.. An aqueous solution of ethylene glycol (C2H6O2) IS 40% ethylene glycol by mass, and has a density of 1.05g/ml. what are the molarity, molality fraction of the solution?
Wednesday, July 7, 2010 at 10:20pm by Linda

chemistry
A student needed to standardize a solution of NaOH which was approximately 0.125 M. The student carefully prepared the titration setup, but after 25 mL of NaOH was added, what was the pH of solution if initially flask contains 25 mL of 0.250 M HCl solution?
Sunday, October 17, 2010 at 6:51pm by Cindy

CHEMISTRY
A student needed to standardize a solution of NaOH which was approximately 0.125 M. The student carefully prepared the titration setup, but after 25 mL of NaOH was added, what was the pH of solution if initially flask contains 25 mL of 0.250 M HCl solution?
Sunday, October 17, 2010 at 4:50pm by Maria

Chemistry
Include an explanation, balanced chemical equation, units, significant figures and/or calculations where appropriate. Standardization of NaOH Solution Trial 1: 0.501 g KHC8H4O4 15.22 mL NaOH Trial 2: 0.503 g KHC8H4O4 15.11 mL Trial 3: 0.500 g KHC8H4O4 15.10 mL Using the data ...
Monday, March 2, 2009 at 10:58pm by Jake

chemistry
1.) How much ethanol, C2H5OH, in liters (d=0.789g/ml) must be dissolved in water to produce 190.5 of 1.65 M C2H5OH? (Molarity problem.) 190.5 WHAT for crying out loud?barrels, freight cars, lakes, I will assume you meant mL. If not that, adjust values below to what you should ...
Friday, February 12, 2010 at 8:22pm by DrBob222

Chem
Vinegar (you can look on the bottle to see) usually is about 5% acetic acid. Convert that 5% (some are 4%) to molarity, then start with enough vinegar to use approximately 40 mL of the NaOH. You can use mL vin x M vin = mL NaOH x M NaOH. Will this get you started?
Sunday, October 10, 2010 at 1:54am by DrBob222

chemistry
What is the result we get when NaOH and Na2CO3 solution are added to alcohol respectively in difference test tubes? (2)Discuss the reactions of aldehydes with fehling's solution.Give the relevant equation. (3)How would ethanoic acid react with ammonia(NH3) and sodium ...
Wednesday, July 20, 2011 at 4:01pm by David

chemistry
How would I calculate the molarity of the resulting solution if 25.0mL of 1.50 M HCL solution is diluted to 500 mL. I know you have to change the milliliters to liters by dividing by 1000 and I know that M= Moles of Solute/Liters of Solute but after that I'm lost. Please ...
Friday, July 1, 2011 at 4:13pm by Daniel

chem
Write the equation. Calculate mols acetic acid. Calculate mols NaOH. Subtract them and see which is in excess. One of them will be left over. Probably,(my guess) acetic acid is left over and all the NaOH is added. Then you know how much sodium acetate is formed and this ...
Monday, August 27, 2007 at 10:42pm by DrBob222

CHEMISTRY
Consider an aqueous solution prepared from 250.0 mL of water and 1.27 g of potassium bromide. Express the amount of potassium bromide in this solution in terms of (a) mass percent (b) mole fraction (c) molarity assume the density of the solution is equal to that of water, 1.00...
Monday, December 13, 2010 at 7:56pm by STACY

Chemistry
Analysis of a compound indicates that it is 49.02% carbon, 2.743% hydrogen, and 48.23% chlorine by mass. A solution is prepared by dissolving 3.150 grams of the compound in 25.00 grams of benzene, C6H6. Benzene has a normal freezing point of 5.50degreeC and the solution ...
Monday, January 10, 2011 at 3:14pm by Tracy

USF
If I need 600ml of a 0.5M NaOH solution and I am given 3M of NaOH, how much NaOH will I need?
Wednesday, June 16, 2010 at 10:31pm by Mc. K

chemistry
A 0.0875 M solution of aqueous ammonia was titrated with a solution of sulphuric acid. If 25.00 mL of the ammonia solution required 30.66 mL of the acid to reach the end-point, calculate the molarity of the acid. NH3(aq) + H2SO4(aq) ¨ (NH4)2SO4(aq)
Thursday, January 10, 2008 at 6:56pm by caleb

chemistry
NaOH + HCl ==>NaCl + HOH Strong base + strong acid. calculate mols NaOH. M x L = ?? calculate mols HCl. M x L = ?? Determine mols NaCl and HOH produced. Determine excess NaOH OR HCl and pH from that. For NaOH + HC2H3O2 ==> NaC2H3O2 + HOH Strong base + weak acid. ...
Monday, May 5, 2008 at 5:31am by DrBob22

Chemistry
Calculate the change in pH if 0.050 g of solid NaOH is added to 250 mL of a buffer solution that contains 0.80 M NaH2PO4 and 0.17M Na2HPO4. I found the pH of the buffer solution to be 6.54.
Thursday, April 4, 2013 at 6:36pm by Matt

chemistry
KHP + NaOH ==> NaHP + H2O moles KHP = grams/molar mass Solve for moles. Look at the equation; it is 1:1 so moles KHP = moles NaOH.] The M NaOH = moles NaOH/L NaOH.
Saturday, October 16, 2010 at 12:26am by DrBob222

chemistry
molarity x liters = moles you would need to know how many moles or liters to use the above formula. How much NAOH are you being asked to find molarity for?
Monday, June 18, 2012 at 12:34pm by Nancy

science
what is the concentration of hydrogen ion in a 0.1M solution of sodium hydroxide(NaOH)? NaOH dissolves and completely dissociates in H2O to form the ions. NaOH ==> Na^+ + OH^- Therefore, starting with 0.1 M NaOH will give you 0.1 M in Na^+ and 0.1 M in OH^-. You know Kw...
Sunday, December 31, 2006 at 9:13pm by michelle

Chemistry
A 5.00-mL sample of an H3 PO4 solution of unknown concentration is titrated with a 0.1003 M NaOH solution. A volume of 6.55 mL of the NaOH solution was required to reach the endpoint. What is the concentration of the unknown H3 PO4 solution?
Monday, March 11, 2013 at 2:13pm by Amee

Chem Problem
Help Please? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was then dissolved in 50.0 ml. of distilled water. The total mass of the solution was found to be 49.401...
Tuesday, October 9, 2012 at 9:50pm by Kelli

chemistry(Urgent Please help)
A student is asked to standardize a solution of barium hydroxide. He weighs out 0.945 g potassium hydrogen phthalate (KHC8H4O4, treat this as a monoprotic acid). It requires 33.9 mL of barium hydroxide to reach the endpoint. A. What is the molarity of the barium hydroxide ...
Sunday, November 20, 2011 at 3:53pm by Hannah

Chem
Please tell me if these are right! 1.How many milliliters of 0.215 M NaOH solution are needed to completely neutralize 2.50 ml of 0.825 M H2SO4 solution? I got 19.2 ml 2. A 10.0-ml sample of vinegar which is an aqueous solution of acetic acid HC2G3O2 requires 16.5 ml of 0.500M...
Monday, December 6, 2010 at 9:17pm by Jessica

AP CHEMISTRY
He got 62.5ml by making up a certain amount of volume for the 0.1M solution and setting it equal to the 0.08 NaOH( which is used to titrate the solution) and determined the amount of NaOH in milliliters needed until the solution hit its endpoint basically he used... M1 x V1 = ...
Thursday, March 1, 2012 at 4:46pm by ALISON

chemistry
A 27.00 mL sample of an unknown H3PO4 solution is titrated with a 0.110 M NaOH solution. The equivalence point is reached when 25.78 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution? The neutralization reaction is: H3PO4(aq) + 3NaOH(aq) -&...
Thursday, September 27, 2012 at 4:16pm by Amanda

Chemistry
A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this solution. 3. Calculate the ...
Monday, January 31, 2011 at 1:02pm by Paul

AP CHEMISTRY
Calculate [OH-] and pH for the following strong base solution; a solution formed by mixing 10.0 mL of 0.011 M Ba(OH)2 with 28.0 mL of 7.4 10-3 M NaOH working and answer would be appreciated
Saturday, February 18, 2012 at 12:10pm by MARY

Chemistry
Chemistry - Danielle , Wednesday, February 11, 2009 at 7:24pm The density of a 22.0% by mass ethylene glycol (C2H6O2) solution in water is 1.03 g/mL. Find the molarity of the solution. Answer in M
Wednesday, February 11, 2009 at 7:25pm by Danielle

chem.
Can you help me do this one? Thanks: 4. A 2.34 mol/L sodium hydroxide solution is reacted with 11.6 g of lead (II) sulphate powder. What volume of sodium hydroxide would react completely? And one more question, would you multiply the answer by 4 since it is 4OH- for every ...
Monday, July 24, 2006 at 2:34pm by Hey!

Chemistry
Hi i kind of get these questions but i got stuck on this... What is the molarity of an H2SO4 solution if 0.25L of the solution contains 0.75L MOL of H2SO4? thanks again for yourself i really do appreciate it :) Molarity= molessolute/litersolution = .75/.25= 3M I assume the ....
Sunday, April 22, 2007 at 1:20am by Fred

College-Chemistry
Balance the equation. 2NaOH + H2SO4 ==> Na2SO4 + 2H2O moles H2SO4 = M x L = 0.145 x 0.037 = 0.005365 Now look at the equation. There are two moles NaOH for each mole H2SO4; therefore, moles NaOH titrated = 2 x 0.005365 = 0.01073 grams NaOH = moles x molar mass = 0.01073...
Friday, February 26, 2010 at 12:12pm by DrBob222

chemistry
15 g CaCl2/molar mass = mols CaCl2. mols/L = molarity. millimolarity is 1000 times that. % W/V is mass in 100 mL solution.
Friday, February 1, 2008 at 10:00pm by DrBob222

Chemistry
H2Ox + 2NaOH ==> 2H2O + Na2Ox moles H2Ox = grams/molar mass Convert moles H2Ox to moles NaOH using the coefficients in th balanced equation. That will give you moles NaOH = 2 x moles H2Ox. Then M NaOH = moles NaOH/L NaOH.
Saturday, March 26, 2011 at 11:39pm by DrBob222

chem
a solution of weak acid of molarity 0.05 mol/dm3 is titrated against 0.1mol/dm3 NaOH, the pka = 3.67 what volume of acid would u use in ur titration?
Sunday, December 7, 2008 at 10:45pm by Kimora

chemistry
If you need 600 mL of a .5 M NaOH solution and 3 M NaOH is provided, how much of the 3 M NaOH will you need?
Wednesday, November 3, 2010 at 12:54pm by Brandon

Chemistry
A 15.5 mL sample of 0.215 M KOH solution requires 21.2 mL of acetic acid in a titration experiment. Calculate the molarity of the acetic acid solution. Please show all steps, I don't understand this.
Monday, May 23, 2011 at 5:51pm by Tina

Chemistry
1. WHy is KHC8H4O4 used as the acid in standardization titration? It is relatively inexpensive and can be obtained in essentially 100% purity. 2. Why should you not shake KHC8H4O4 (Acidic solution) before titrating it with NaOH (Basic solution)? Air contains a small amount of ...
Sunday, February 1, 2009 at 8:18pm by DrBob222

Organic Chemistry
It's a stoichiometry problem. Actually, two of them. I'll do the first and leave the second for you. By the way, the lasrt one I worked almost completely for you BECAUSE I wanted to print it out (with the solution) and put in a notebook I keep. I think benzoic acid is ...
Tuesday, May 18, 2010 at 1:25pm by DrBob222

chemistry
An aqueous solution of Na2SO4 has a molal concentration of 0.293 mol kg-1. Its density is 1.0350 g mL-1. Calculate the molar concentration of Na2SO4. ----- mol L-1 Calculate the mass percent of Na2SO4 in the solution. ------- % What is the mole fraction of Na2SO4 in the ...
Sunday, May 2, 2010 at 12:47am by write2khin

chemistry
three student chemists measured 50.0 mL of 1.00 M NaOH in separate Styrofoam "coffee cup" calorimeters ( Part B). Brett added 50.0 mL of 1.10 M HCI to his solution of NaOH; Dale added 45.5 mL of 1.10 m HCL 9 eqaul moles) to his NaOH solution. Lyndsay added 50.0 mL of...
Monday, January 17, 2011 at 3:16pm by Daniel

Chemistry
Use the density to calculate mass of the solution. Volume of solution is Z mL + Z mL. So mass soln = 2Z mL x Y g/mL. I think these problems are made to confuse students and they succeed with me. I'll let you convert the velow information to the format of the problem. q ...
Friday, April 2, 2010 at 10:52am by DrBob222

Chemitry
I don't think you have all of the information needed to solve the problem. You need molarity of the citric acid and molarity of the NaOH. For whatever it's worth, 50 cm of citric acid is not a volume.
Monday, January 2, 2012 at 12:50pm by DrBob222

Chemistry
The density of the solution must be known in order to calculate a mass of the solution.
Friday, June 17, 2011 at 8:07am by DrBob222

chemistry
When 2.53 g of NaOH(s)(40.0g/mol) dissolves in 100.0 g of water, the temperature of the solution changes from 20 degrees C to 26.3 degrees C. Calculate qrx in KJ/mol specific heat of the solution is 4.18 J/(g*K)
Wednesday, October 27, 2010 at 5:30pm by Tara

Chemistry 12
15. The concentration of hydroxide ions in a solution of nitric acid 0.2 M is: a. 2 x 10-14 M b. 5 x 10-14 M c. 5 x 10-7 M d. 2 x 10-1 M 16. Aqueous solutions of strong acids and strong bases: a. are good electricity conductors b. make litmus paper become red c. have a pH of 7...
Monday, December 3, 2012 at 6:58pm by Need Help

chemistry 1046
A.Determine the pH of the solution. a solution that is 1.17% HCl by mass (Assume a density of 1.01 g/mL for the solution.) B. Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 279 mg/L.
Tuesday, July 3, 2012 at 8:27am by Anonymous

Chemistry
An aqueous solution contains 2.6 %NaCl by mass. Calculate the molality of the solution.
Thursday, August 5, 2010 at 3:21pm by ashley

Chem
Hypothesis: A prediction of what you think the results of the project will be. Write your hypothesis before you begin the experiment and, if the experiment has more than one part, you will need a hypothesis for each section. Remember to create an ‘if-then’ statement...
Sunday, November 25, 2012 at 7:14pm by Jessica

chemistry
what is the molarity of an aqueous solution that is 6.75% glucose by mass? Assume a density of 1.03 g/ml
Sunday, November 6, 2011 at 1:48am by swtnblk

APChem
"The osmotic pressure of a saturated solution of strontium sulfate at 25C is 21 torr. What is the solubility product of this salt at 25C (Hint: calculate molarity from the colligative properties eqn of osmotic pressure and use it in the equilibrium expression" I ...
Wednesday, March 17, 2010 at 8:23pm by Kiki

chemistry
calculate the molarity of 70.7g C2H6O in 2.25 L of solution, can someone walk me through this and provide the right answer? please and thank you =))
Friday, December 3, 2010 at 9:28pm by Jenni

Chemistry
I'm not sure what you are to calculate; perhaps it is delta H/mol or gram. Also, you don't specify the kind of calorimeter you are using. You might be using a styrofoam cup one or a real calorimeter. How did you weigh the material(s)? Would a better balance have helped...
Wednesday, October 24, 2007 at 12:35pm by DrBob222

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