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

Number of results: 68,446

Chemistry
A chemistry student weighs out 0.123 grams of chloroacetic acid (HCH2ClCO2) into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 moles/liter NaOH solution. Calculate the volume of NaOH solution the ...
Thursday, January 19, 2012 at 4:05pm by Deborah

Chemistry
chemistry student weighs out 0.123 grams of chloroacetic acid (HCH2ClCO2) into a 250. milliliter volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1200 moles/liter NaOH solution. Calculate the volume of NaOH solution the student...
Thursday, January 19, 2012 at 9:25am by Deborah

CHEMISTRY- molarity
what is the molarity of the solute in the following solution: a 12.5% w/v Co(NO3)2 solution?
Saturday, October 9, 2010 at 3:42am by lucy78

Chemistry
A sample of oxalic acid, H2C2O4, is titrated with standard sodium hydroxide, NaOH, solution. A total of 45.2 mL of 0.12 M NaOH is required to completely neutralize 20.0 mL of the acid. What is the concentration of the acid? Concentration is Molarity, which is moles solute / ...
Tuesday, February 2, 2010 at 10:57pm by Anonymous

Science/Chemistry
Zn(OH)2 solid (molecular mass = 99.41 amu) is added to 0.500 L of 0.50 M HBr. The resultant solution which is acidic, requires 185 mL of 0.500 M NaOH for neutralization. Calculate the mass (in mg) of Zn(OH)2 that was originally added (problem 53 in Purdue test bank)
Sunday, September 28, 2008 at 4:42pm by Kelsey

chemistry
A commercial sample of concentrated aqueous nitric acid (HNO3) is 18.2% nitric acid base mass and has a density of 1.12 g/mL. (a) What is the molarity (M) of the HNO3 solution? (b) What is the molality (m) of the HNO3 solution? -------- I know that.... (a) molarity = moles of ...
Wednesday, January 21, 2009 at 7:54pm by Sarah

organic chemistry
First, this doesn't look like an organic chem question to me. I don't know any organic chemistry but this one I can work. moles NaOH = Molarity NaOH x liters NaOH = ? Convert moles NaOH to moles H2SO4 this way. ?mols NaOH x (1 mole H2SO4/2 moles NaOH = ?moles NaOH x 1/...
Tuesday, January 31, 2012 at 10:01pm by DrBob222

chemistry
a solution of sulfiric acid is 40% H2SO4 by mass and it has a density of 1.30g/ml at 25 degrees Celcious. the molarity of this solution is....?
Sunday, October 3, 2010 at 11:58pm by lizza

Chemistry
The density of a 22.0% by mass ethylene glycol (C2 H6 O2) solution in water is 1.03 .Find the molarity of the solution.
Wednesday, February 11, 2009 at 7:56pm by HELP PLEASEEE

Chemistry
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 7:22pm by Danielle

chemistry
Calculate the molarity of a solution prepared by diluting 200.0 mL of 4.0 M HCl to 500.0 mL of solution a. 1.1 M b. 1.6 M c. 2.7 M d. 10. M
Sunday, December 11, 2011 at 4:32pm by anonymous

chemistry
5% means 5.00g acetic acid in 100 mls of solution. That is equivalent to 50.0 g acid/L. The molar mass of acetic acid is about 60.05g/mole (50.0 g acid/L.)(1 mol / 60.05g) = 0.8326 mol/L The reaction is: HC2H3O2 + NaOH --> NaC2H3O2 + H2O based on the reaction, moles of ...
Thursday, October 22, 2009 at 10:18am by GK

Chemistry
An antacid tablet weighing 1.462 grams was dissolbed in 25mL of 0.8M HCl and diluted with water. The excess HCl was titrated with 3.5 mL of 1.019M NaOH solution. 1. Calculate the number of millimoles added to the tablet 2. Calculate the number of millimoles of NaOH required ...
Monday, October 4, 2010 at 4:12pm by Jennifer

chemistry
Technically, there may not be ANY HCl in the Lysol but you may calculate the acidity in terms of the HCl content. moles NaOH = M x L = ?? moles HCl = same thing since 1 mole NaOH exactly neutralizes 1 mole HCl. g HCl = moles HCl x molar mass HCl. %HCl = (mass HCl/mass sample)&...
Monday, June 21, 2010 at 7:41pm by DrBob222

Chemistry
In a experiment to determine the molecular weight and the Ka for ascorbic acid (vit. c.) a student dissolved 1.3713g of the monoprotic acid in water to make 50 mL of solution. The pH was monitored throughout the titration. The equivalence point was reached when 35.23 mL of the...
Saturday, May 19, 2007 at 6:57pm by Tri

Chemisty
A solution contains 0.0653g of compound in 8.31g of ethanol. The molarity of the solution is 0.0368m. Calculate the molecular weight of the compound
Thursday, February 7, 2008 at 9:37pm by Lauren

Science_Chemistry
A glucose (C6H12O6) solution is 2.5% glucose by mass. If the density of the solution is 1.10 g/mL, what is the molarity of glucose/water solution?
Monday, May 2, 2011 at 11:05am by Samantha

chemistry
calculate the molarity of each of the following solution: 2.00 mol glucose in 4.00 L solution.
Friday, June 25, 2010 at 7:07pm by Ana

chemistry
calculate the molarity of each of the following solution: 2.00 mol glucose in 4.00 L solution.
Friday, June 25, 2010 at 12:45pm by Ana

chemistry
a solution of sulphuric acid is titrated (allquot 20.0ml) with a solution of sodium hydroxide (0.1234M) 26.73ml of the base being required to the end point with phenolphthalein. calculate the molarity of the sulphuric acid solution
Saturday, November 19, 2011 at 9:01pm by payton

Chemistry - urgent
What form of NaOH did you use? Assume granular. moles NaOH=3/40 moles HCl needed= 3/40=volume*Molarity so lets see what 7 ml will neutralize molarity=3/40/.007= or about 10Molar. 32Percent HCl is about 10M
Tuesday, September 21, 2010 at 10:03am by bobpursley

chem.
A 10.0 mL of vinegar, an aqueous solution of acetic acid (HC2H3O2), is titrated with .5062M NaOH, and 16.58mL is required to reach the equivalence point. A. What is the molarity of the acetic acid? B. If the density of the vinegar is 1.006 g/cm^3, what is the mass percent of ...
Friday, March 7, 2008 at 12:33pm by Aditya

Chemistry
1. mols HCl = M x L = ? mols NaOH = mols HCl mols NaOH = grams/molar mass. You know molar mass and mols, solve for grams. 2.mols NaOH = grams/molar mass = estimated 0.01 mols HCl = grams/molar mass = estimated 0.02. NaOH + HCl ==> NaCl + H2O 0.02 mols HCl - 0.01 mols ...
Thursday, May 9, 2013 at 2:22pm by DrBob222

Chemistry
3) A student dissolves a 1.18g aspirin tablet in water and titrates the solution with a .265M NaOH. 22.05mL of NaOH are required to reach the equivalence point. Calculate the percentage of acetylsalicylic acid in the tablet.
Monday, October 25, 2010 at 2:49pm by Juliet

Chemistry
(a) to get the weight/volume percent, we just divide the mass of the compound to the volume, and multiply by 100: 25 g / 1000 mL * 100 = 2.5 % w/v (b) recall that molarity is moles of solute per liter of solution. thus first get the number of moles of the compound by dividing ...
Monday, August 29, 2011 at 11:13am by Jai

chemistry
Calculate the molarity of a solution containing 40.0 g glucose (C6H12O6) in enough ethanol (C2H5OH) to make 40.0 mL of solution.
Wednesday, February 10, 2010 at 12:04am by CC

Chemistry
What is the moles of NaOH when molarity is .2744 125 mL flask Mass 9.398 Volume 29.90
Saturday, October 6, 2012 at 9:53am by John

chemistery
A student dissolves 196 g of H3PO4 (Molar mass = 98 g) in enough water to make one liter of solution. The molarity of the solution is ?
Sunday, December 9, 2012 at 7:13pm by ogb

chemistry
what is the molarity of the solution which contains 5.0g of NaOH(formar weight=40g/mole)dissolved in water to make 200 ml of soluitons?
Friday, September 4, 2009 at 5:27pm by DJ

Chemistry
Calculate the molar mass of a diprotic acid. The reaction reaches the endpoint of the titration with NaOH at 28ml. The initial concentration of NaOH is 0.09792. and the initial mass of the diprotic acid is 0.685g. How do you get to the final answer? All of the options are ...
Sunday, March 31, 2013 at 9:08pm by Shannon

chemistry
A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...
Saturday, July 14, 2012 at 10:14am by aa

Chemistry
1.Calculate the pH of a solution prepared by mixing 20mL of the .07222M aspirin solution with 10mL of .2M NaOH. 2. Calculate the pH for the titration of 40mL of .1M solution of C2H5NH2 with .1M HCl for a)0 mL added and b)20 mL added c)40 mL added d)50mL added. Kb= 6.4x10^-4
Saturday, November 26, 2011 at 8:14pm by Jessica

Chemistry
when pure sodium hydroxide is dissolved in water , heat is evolved in a laboratory experiment measure a molar heat of solution of sodium hydroxide the following procedure was followed. to a calorimeter containing 300g of water at 20.0 C and 10.65g of NaOH also at 20.0 C was ...
Friday, March 23, 2007 at 8:58am by jim

chemistry
Neutralization Reaction Molarity Calculations: For example: What is the molarity of a Ca(OH)2 solution if .032 L of the solution is exactly neutralized by .015 of a 0.56 M HCl? How do I solve- I am unsure where to begin.
Monday, April 25, 2011 at 8:47pm by Hannah

Chemistry
1) Write a balanced chemical equation for the reaction between Cu(NO3)2 * 3 H2O and NaOH. Underline the formula for the precipitate produced by this reaction. (The water of hydration in Cu(NO3)2 * 3 H2O appears as liquid water on the right side of the equation) 2) Calculate ...
Monday, May 17, 2010 at 6:59pm by Sarah

Chemistry
Calculate the volume of 2.45 M NaI that would be needed to precipitate all of the Hg+2 ion from 185 mL of a 2.44 M Hg(NO3)2. AND Calculate the molarity of an acetic acid solution if 47.81 mL of the solution is needed to neutralize 147 mL of 1.32 M sodium hydroxide.
Monday, May 6, 2013 at 3:52pm by Marsha

Chem Question
What is the molarity of a NCL solution if 37.50 mL of the acid is needed to neutralize 25.00 mL of 0.0725 M NaOH? I'm not quite sure how to go about doing this one. And also this one thing. The following technical errors were committed in standardizing the NaOH. What will ...
Thursday, March 8, 2007 at 10:25am by Angie

chemistry
I have no idea how to solve this problem, please help me out.... thanks a) A liter of a solution saturated at 25degree with calcium oxalate, CaC2O4, is evaporated to dryness, giving a 0.0061gm residue of CaC2O4. calculate the concentrations of the ions, and molar solubility ...
Friday, April 6, 2007 at 10:19pm by wendy

chemistry
I need some help with calculating percent yield and percent purity of aspirin. Here's my data (questions follow): SYNTHESIS Mass of salicylic acid.., 2.0 g Volume of acetic anhydride.., 5 mL Mass of watch glass.., 22.10 g Mass of aspirin and watch glass.., 28.01 g Mass of ...
Saturday, March 24, 2007 at 11:33am by Jim

chemistry
molarity = # moles/liter of solution. So how many moles do we want for 500 mL of 0.02 M KMnO4? We want M x L = moles = 0.02 x 0.5 L = 0.01 moles. moles = grams/molar mass. You know moles and molar mass, calculate grams.
Saturday, October 24, 2009 at 2:28pm by DrBob222

Chemistry
How do i determine the exact molarity of .2 M of HCL? The molarity of NaOH Used was .2010M used in the titration. And the volume used 10.33 mL used to reach equivalence point. What would be the Molarity of HCL?
Tuesday, March 22, 2011 at 5:47pm by Katie

Chemistry
(a) Grams of solute in 185.8 mL of 0.267 M calcium acetate Moles solute = M x L. Then moles x molar mass = grams. (b) Molarity of 500. mL of solution containing 21.1g of potassium iodine M = moles/L. 21.1/molar mass KI = mols KI and divide by 0.5L. (c) Moles of solute in 145.6...
Monday, September 28, 2009 at 12:28am by DrBob222

Chemistry
A. Na2O + HOH ==> 2NaOH B. There is a long way and a short way of doing this. The long way is to make a stoichiometry problem out of it, convert g Na2O to moles, calculate moles NaOH formed, then use M = moles/L. A shorter way is to forget about stoichiometry and reason...
Sunday, November 21, 2010 at 5:03pm by DrBob222

Chemistry
1. You will need 600mL of a 0.5M NaOH solution. 3M NaOH is provided. Determine how much of the 3M NaOH you will need and write a procedure in your notebook for making the solution.
Wednesday, June 16, 2010 at 11:44pm by Lucinda

chem 111 lab
if a student used 12.45mL of their NaOH solution to neutralize 10.00mL of a 0.543 KHP solution, then what is the concentration of the student's NaOH solution?
Monday, February 20, 2012 at 6:22pm by danielle

Chemistry
25.0 ml of a 0.100 M solution of the weak acid, CH3OOH is titrated with a 0.10 M solution of the strong base, NaOH. Calculate the pH of the equivalence point.
Sunday, February 26, 2012 at 10:44am by ASood

molarity
An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of the solution was ...
Friday, February 16, 2007 at 12:54pm by christine

chemistry
In a laboratory experiment, a 18.0 ml sample of NaCl solution is poured into an evaporating dish with a mass of 24.00 g. The combined mass of the evaporating dish and NaCl solution is 37.15g. After heating, the evaporating dish and dry NaCl have a combined mass of 26.50 g. If ...
Saturday, October 9, 2010 at 1:22am by Allyse

chemistry
A sample of 7.83 grams of NaOH is dissolved into 620 mL of aqueous 0.250 M NaOH (as- sume no volume change). This solution is then poured into 1.67 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution?
Monday, September 6, 2010 at 1:49pm by Anonymous

Chemistry
If a solution of sodium hydroxide is mixed from a 3M solution of sodium hydroxide, such that the volume of the original solution is 50ml and the volume of the final solution is 150ml, determine each of the following: a. The volume of water added to the solution b. The new ...
Friday, December 28, 2012 at 1:50pm by Ece

chemistry
moles H3PO4 = 0.0296 L x 0.275 M=0.00814 the balanced equation is H3PO4 + 3 NaOH = Na3PO4 + 3 H2O the ratio between H3PO4 and NaOH is 1 : 3 moles NaOH = 3 x 0.00814 =0.0244 molarity of NaOH = 0.0244 mol/ 0.175 L=0.140 M
Thursday, September 4, 2008 at 9:14am by sammy jo

Chemistry
I can't make heads or tails of the post. We have a tough time spacing on these boards. In general, however, calculate (Fe^+3) from mols in the solution (molarity x L) and divide that by total volume of the diluted solution.
Thursday, April 10, 2008 at 3:30am by DrBob222

Chemistry
Could someone please help me with these two questions. I am having trouble. 1. What is the molarity of a solution if 48.0 mL of a 0.220 M solution is required to neutralize a 25.0-mL sample of the solution? 2. The mixing of which pair of reactants will result in a ...
Sunday, September 19, 2010 at 11:32am by Sarie

difficult chemistry
Calculate the molarity of thiosulfate solution if 0.400mg of Kl03 required 100ml of the thiosulfate solution provided that excess kl and hcl were added. Who helps me
Saturday, January 12, 2013 at 8:48pm by Fai

Chemistry
12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.
Sunday, November 28, 2010 at 8:00pm by Alex

Math
1. Write the balanced chemical equation for the reaction NaOH + HCI --> NaCI + H20 2. Extract the relevant information from the qustion: NaOH v= 30mL, M=0.10 HCI v= 25.0 mL, M=? 3. Convert to Liters NaOH v= 0.03 L, M= 0.10M HCI v=0.025L, M=? 4. Calculate moles NaOh: n(...
Monday, March 8, 2010 at 11:11am by Maria

Chemistry
if 20.00 grams of NaOH are diluted in enough water to make 1.00 liter, what is the molarity of the solution?
Wednesday, December 5, 2012 at 9:27pm by Anonymous

Chemistrylaboratory
(a)1. prepare a buffer solution by using acetic acid and sodium acetate.2. prepare M/40 NAOH solution.(b)1.aqueous solution of NAOHis electrolyte or non- electrolyte.2. measure the ph of the following :- lemom juice, coko -cola, NAOH SOLUTION
Friday, May 2, 2008 at 9:41pm by suchismita mandal

Chemistry
Use the Henderson-Hasselbalch equation to calculate the pH of each solution: a solution that contains 1.05% C2H5NH2 by mass and 1.10% C2H5NH2Br by mass
Monday, June 13, 2011 at 6:56pm by HELP HELP

Chemistry please help!
Please help. I have no idea how to do these 4 homework problems. 1- How many milliliters of 0.140 M HCl are needed to completely neutralize 42.0mL of 0.106 M Ba(OH)2 solution? 2-How many milliliters of 0.123 M H2SO4 are needed to neutralize 0.250 g of NaOH ? 3-If 55.2 mL of ...
Monday, February 22, 2010 at 1:30pm by Robert

chemistry
The Ka for hydroflouric acid is 4.5 *10^-4 at 298K. Calculate the amount of sold NaF that is required toprepare a 250. mL acidic buffer with pH = 2.75. The inital molarity of hydroflouric acid is .250M but you have only 75mL. Part 2 Recalculate the pH of the buffer prepared in...
Wednesday, April 6, 2011 at 9:48pm by John

ap chemistry
A 37 mL sample of a solution of sulfuric acid is neutralized by 42 mL of a 0.113 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L
Tuesday, March 5, 2013 at 8:21pm by cheri

chemistry
You don't have questions here. Mostly just statements. Here is the equation. HA + NaOH ==> H2O + NaA I assume the benzoic acid was titrated with the NaOH and the question is to determine the molar mass of benzoic acid. LNaOH x M NaOH (from part a) = moles NaOH. ...
Friday, November 4, 2011 at 1:19am by DrBob222

Chem 1010
15.3 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 600 mL of solution. Calculate the molarity of the KCl solution.
Tuesday, April 10, 2012 at 6:16pm by Sirena

Chemistry
Calculate the molarity of Na2C204 solution prepared by dissolving 1.2222 grams of pure Na2C204 in enough water to make 500.00 mL of solution.
Tuesday, October 25, 2011 at 10:57pm by Ashley(please help!!!!)

chem
Consider the reaction that occurs on mixing 50.0 mL of 0.560 MNaHCO3 and 50.0 mL of 0.400 M NaOH at25oC. (a) Write a balanced net ionic equation for thereaction. (b) What is the pH of the resulting solution? (c) How much heat (in joules) is liberated by thereaction? (standard ...
Tuesday, March 29, 2011 at 7:21pm by pal

Chemistry
How to find the molarity of NaOH when the given is 0.1803 grams of KHPg/mol molecular w. of KHP is 204.2 9.7 ml NaOH
Thursday, December 9, 2010 at 8:51am by prince

Chemistry
2NaOH + H2SO4 --> Na2SO4 + H2O moles H2SO4 = M x L moles NaOH = 2x moles H2SO4 Molarity NaOH = moles NaOH/L NaOH.
Sunday, September 19, 2010 at 11:32am by DrBob222

chemistry
We have an aqueous solution that contains 47% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 209 g/mol. The density of the solution is observed to be 1.3 g/mL. What is the molarity of Z in this solution? Answer in units of mol/L
Thursday, September 13, 2012 at 5:20pm by cheri

chemistry
if 50.0 mLs of HCl of unknown concentration is titrated to neutrality with 90.0 mL of .650 M NaOH. calculate the molarity of the HCl
Monday, November 14, 2011 at 5:15pm by susan

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? ...
Tuesday, December 18, 2012 at 7:53pm by lauren

chemistry
this is a really long question. i don't understand how to answer it. help please. A 10.0% aquueous solution of sulfuric acid has a density of 1.0661 g/mL at 20 degrees celsius. A. how many grams of H2SO4 are found in 50.0 g of this solution? B. how many grams of water are ...
Sunday, April 7, 2013 at 10:58pm by Nicole

chem-acid-base titrations
1/ HC2H3O2 + NaOH ==> HOH + NaC2H3O2 2. Calculate mols NaOH from L x M = ?? Convert mols NaOH to mols HC2H3O2 using the coefficients in the balanced equation. M acetic acid= mols/L. 3. Determine mols acetic acid in the 10 mL sample and from that grams acetic acid, then ...
Monday, April 21, 2008 at 10:06pm by DrBob222

chemistry laboratory
1. You don't say what the pH must be. Decide that, use pH = pKa + log(base)/(acid) and calculate the base/acied ratio, then convert to mass. 2. How many mols NaOH do you need? mols NaOH = M x L = ? mols = grams/molar mass.Solve for grams.
Thursday, May 31, 2012 at 11:48pm by DrBob222

Chemistry
Suppose we have a solution of lead nitrate, Pb(NO3). A solution of NaCl(aq) is added slowly until no further precipitation occurs. The precipitate is collected by filtration, dried and weighed. A total of 10.27g of PbCl2(s) is obtained from 200.0mL of the original solution. ...
Wednesday, April 17, 2013 at 10:14am by Katherine

chem.
Acetic acid is CH3COOH (HC2H3O2). Its the right end H that is acidic. CH3COOH + NaOH ==> CH3COONa + HOH mols NaOH required = M x L = ?? mols acetic acid must be the same since the reaction is 1 mol CH3COOH to 1 mol NaOH. Molarity CH3OOH = # mols/L = mols/0.10 = xx. For ...
Friday, March 7, 2008 at 12:33pm by DrBob222

URGENT CHEMISTRY
A solution of hydrogen peroxide is 24.26% by mass and has a density of 1.11g/cm^3. the molarity of the solution? 7.54M .273M 8.03M 8.37M none of these
Wednesday, March 9, 2011 at 5:37pm by Cotton McKnight

chemistry
Calculate the pH of the following solutions. (A) 0.95 NaOH (B) 9.9x10^-10 M NaOH (C) 6.7 M NaOH
Saturday, May 4, 2013 at 2:02pm by wes

chemistry
The question gives you the pH and asks you to calculate the concentration of the hydroxide ion. (OH^-) is read as "the concentration of the hydroxide ion". Actually it is NaOH which the problem uses but since the NaOH is 100% ionized in solution, then (NaOH) and (OH...
Wednesday, May 7, 2008 at 9:35pm by DrBob222

Chemistry
To a beaker containing 200 mL of a solution of CuSO4 was added 10.0g of magnesium metal. When the reaction was complete, a mixture of Mg and Cu having a mass of 14.50g remained in the beaker. Calculate the molarity of the original CuSO4 solution. I understand that I need to ...
Friday, February 17, 2012 at 3:04pm by Kay

chemisrty
Q4) Suppose you prepare 950 mL of a solution by dissolving 100 grams of NaCl in 900 mL of water. Assuming the density of pure water to be 1 g/mL, answer the following questions with regards to this solution: a) What is the mass percent of water in this solution? b) What is ...
Monday, January 16, 2012 at 4:43pm by lyan

Chemistry
1.0L of aqueous solution in which [H2CO3]=[HCO3^-]=0.10M and has [H^+]=4.2E-7. What is the concentration of [H^+] ofter 0.005 mole of NaOH has been added? H2CO3 ==> H^+ + HCO3^- k1 = (H^+)(HCO3^-)/(H2CO3) I don't know if you are supposed to calculate or to look up ...
Tuesday, August 7, 2007 at 7:26am by Vic

AP chemistry
We have an aqueous solution that contains 22% (by mass) of a hypothetical solute Z. The formula weight of the solute Z is 173 g/mol. The density of the solution is observed to be 1.4 g/mL. What is the molarity of Z in this solution? Answer in units of mol/L.
Sunday, October 24, 2010 at 6:22pm by Anonymous

Chemistry
For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...
Wednesday, October 26, 2011 at 10:55am by Hannah

chemistry
Investigating changes in colligative properties involves the measurement of a solution’s concentration in molality instead of molarity because of which of the following? the mass of the solvent does not change, but its volume does change, as temperature changes. the ...
Monday, March 28, 2011 at 1:02pm by Annie

Chemistry II
A solution of ethanol in water is prepared by dissolving 61.0 mL of ethanol (density = 0.79g/mL) in enough water to make 280.0 mL of solution. What is the molarity of the ethanol in this solution? definition of molarity = #mols/L. mass ethanol = m = volume x density = 61.0 mL ...
Monday, April 16, 2007 at 9:46pm by Jayd

Chemistry
A .682 g sample of an unknown weak monoprotic acid, HA, was dissolved in sufficient water to make 50mL of solution and was titrated with a .135 M NaOH solution. After the addition of 10.6mL of base, a pH of 5.65 was recorded. The equivalence point was reached after the ...
Thursday, May 10, 2007 at 2:57pm by Sara

chemistry
If 36.3 ml of 0.152M NaOH is required to neutralize 25.00 ml of an HC2H3O2 solution ,what is the molarity of the acetic acid?
Tuesday, September 11, 2012 at 10:44pm by HJ

Chemistry
Do you want % w/w. % w/v, M, N, just what. For molarity you do this. mols NaOH = grams/molar mass. Then M = mols/L soln.
Wednesday, May 9, 2012 at 5:45pm by DrBob222

chemistry
A solution contains 5.00% (by mass)NaCl. The density of the solution is 1.064 g/cm^3. What is the molarity of NaCl?
Monday, November 19, 2012 at 1:16pm by evelyn

Chemistry
a. mol KHP = 0.4885g/molar mass = ? M = mols/0.1 L = approximately 0.024 but you need to do it more accurately. At the equivalence point the pH is determined by the hydrolysis of the P^2- ion. .........P^2- + HOH ==> HP^- + OH^- I.......0.024M...........0.......0 C...
Thursday, November 29, 2012 at 8:36pm by DrBob222

chemistry
Using a BCA table, calculate the molarity of a 25.0 mL sample of HNO3 thats is titrated to its endpoint with 22.7 mL of 0.200 M NaOH.
Sunday, May 11, 2008 at 12:25pm by caleb

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? ...
Sunday, September 16, 2012 at 11:09pm by cheri

Chemistry
An unbuffered solution contaning 0.000018 M HCl .Calculate PH after adding 1 mL of 0.1 M NaOH to 100 mL of solution.
Sunday, December 11, 2011 at 8:37am by Ethio

General Chemistry
"How would you prepare 150. mL of 0.1M sodium hydroxide given a stock solution of 3.0M NaOH?" I made calculations and figured the process would be to dilute 5 mL of the 3.0M NaOH to 150. mL. Is this correct? For the ideal 150. mL of 0.1M NaOH, I calculated there to ...
Sunday, April 21, 2013 at 9:18pm by Emily

adult education
molarity=mole/liter= mass/(molmass*volume) solve for mass massingrams=molarity*molmassKOH*.2Liter
Friday, April 23, 2010 at 9:31am by bobpursley

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

For Further Reading