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March 26, 2017

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chem
Calculate the pH of each and determine whether each of the following solutions is acidec or basic. a) [H^+]=1.0 e-11M solution b) [OH^-]=1.5 e-3M solution c) [H^+]=5.2 e -5M solution
November 29, 2012 by Bea Alonzo

chemistry
Calculate .200 mol sodium phosphate in 10.0 ml of solution
March 4, 2011 by Anonymous

Chemistry
Calculate the pH of a 1.19M sodium formate, HCOONa, solution.
November 23, 2014 by Bill

chemistry
A buffer is made by adding 0.300 mol HC2H3O2 and 0.300 mol NaC2H3O2 to enough water to make 1.00 L of solution. The pH of the buffer is 4.74 . Calculate the pH of this solution after 0.020 mol of NaOH is added.
December 10, 2009 by Ericka

chemistry
The titration of 5.40 mL of a saturated solution of sodium oxalate, Na2C2O4, at 25∘C requires 29.4 mL of 2.200×10−2 M KMnO4 in acidic solution. What mass of Na2C2O4 in grams would be present in 1.00L of this saturated solution?
January 18, 2016 by sara

chemistry
A buffered solution is made by adding 50.0 g NH4Cl to 1.00 L of a 0.84 M solution of NH3. Calculate the pH of the final solution
August 10, 2010 by chris

chemistry
a 1.00 L aqueous solution contained 5.80 g of NaOH. what is the pH of the solution? Can someone help me out with the setup of this?
April 28, 2010 by Anna

Chemistry
Why is a NaOH solution disposed differently than a solution composed of Water and Nacl2
May 6, 2010 by Marge

Chemistry
.012 mol of solid NaOH is added to a 1 L solution of HCl 0.01 M. What is the pH of the solution?
May 13, 2013 by scilover

Chemistry:Important!!!!!!!
20.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 39.13 mL of a 0.1061 M NaOH solution. What is the concentration of the H2SO4 solution?
March 3, 2014 by Jackie

Physical Science
5. What reactions occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of calcium hydroxide, Ca(OH)2? (A) Cl + Ca(OH) --> HCa + Cl(OH)2 (B) HCl + Ca(OH)2 --> H(OH)2 + CaCl (C) 2HCl + Ca(OH)2 --> 2H2O + CaCl2 (D) 2HCl + Ca(OH)2 --> H2Ca + 2ClOH...
October 16, 2013 by CJ

chemistry
When 10.0 mL of 0.012 M pb(NO3)2 is mixed with 10.0 mL of 0.030 M KI, a yellow precipitate of PbI2(s) forms. a)Calculate the molarity of [Pb^2+] b)Calculate the initial molarity of [I^-] c)On measuring the equilibrium concentrations of [I^-] it came out to be 8.0 x 10^-3 M. ...
August 15, 2010 by Anonymous

Chemistry
A solution is made by dissolving 18.9 g of HCl in enough water to make 716 mL of solution. Calculate the pH of the solution at 25 degrees C
December 5, 2012 by Kristen

Chemistry
A solution is made by dissolving 18.9 g of HCl in enough water to make 716 mL of solution. Calculate the pH of the solution at 25 degrees C
December 5, 2012 by Kristen

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

Chemistry
What is the concentration of OH- in a solution that contains 0.225g of NaOH in 0.250L of solution?
April 2, 2011 by allison

Chemistry II
Acetone, C3H6O, is the main ingredient of nail polish remover. A solution is made up by adding 35.0mL of acetone(d=0.790g/mL) to 50.0mL of ethyl alcohol,C2H6O(d=0.798 g/mL). Assume that the volumes are additive. From this information calculate the molarity of acetone in the ...
September 27, 2009 by Mandy

Chemistry
When HCl(aq) is exactly neutralized by NaOH(aq), the hydrogen ion concentration in the resulting mixture is a. always equal than the concentration of the hydroxide ions b.sometimes greater and sometimes less than the concentration of the hydroxide ion c. always greater than ...
April 20, 2010 by Julia

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?
November 10, 2010 by Candy

Chemistry
A solution of I2 was standardized with ascorbic acid. Using a .1000 g sample of pure ascorbic acid, 25.32 mL of I2 were required to reach the starch end point. A. What is the molarity of the iodine solution? B. What is the titer of the iodine solution?
November 10, 2010 by Candy

Chemistry
If your solution’s final volume of 32.55 mL yields 3.6 grams of AgCl, determine the Molarity of the final solution. Also, how many milliliters of a 1.85 M solution of AgNO3 did you add to an excess of aqueous NaCl to provide the 3.6 grams of AgCl?
March 26, 2013 by Shoba

chemistry
Choices: True,False. Select all that are True. The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water. One cannot prepare a buffer from a strong acid and its conjugated base, ...
November 26, 2011 by paul

College Chemistry
48.70 mL of an HCl stock solution was transferred into a 500 mL volumetric flask and filled to the mark. 47.67 mL of the diluted solution was titrated with 0.179 M NaOH and found to have the concentration of 0.885 M. What is the concentration of the stock solution?
December 11, 2010 by Mark

Chemistry
Why would NAOH solution need to be added when preparing the K2CrO4 stock solution?
September 14, 2009 by Rose

chemistry
How many milliliters of .50 M NaOH solution are required to titrate 40.0 mL of a 0.10 M H2SO4 solution to an end joint?
March 6, 2010 by lacey

chemistry
How many grams of NaOH should be dissolved in 1 litre of solution to prepare a solution with pH value12
June 2, 2010 by sanya

chemistry
If 40 mL of a 6 {\rm M} \;{\rm NaOH} solution is diluted to a final volume of 200 mL, what is the resulting concentration of the solution?
December 6, 2010 by warla

chemistry
In order to dilute 1L of 6M solution of NaOH to .5M solution, how much water must be added?
March 17, 2011 by chris

Biochem
What is the pH and pOH a solution that was made by adding 400 mL of water to 350 mL of 5.0 x 10^-3 M NaOH solution?
September 2, 2011 by Max

Chemistry
What is the concentration of a solution if I dissolve 42g of NaOH in a total volume of 375ml of solution
May 9, 2012 by Anonymous

Chemistry
I have a 40 ml solution of pH 4.36. I need to make this solution at pH 8.5 by adding extra 10 ml of HCl and NaOH. Thanks
August 6, 2012 by AAA

chemistry
How would you prepare 385 ml of a 0.856 m NaOH solution starting with a 4.93 m stock solution
October 16, 2014 by Keyera

science
How much water must be added to 200 g of a 10% NaOH solution to obtain 8% solution
November 15, 2015 by mustafa

Chemistry
What will be the pH of an aqueous solution containing 0.040 mol/L sodium hydroxide?? I got 1.40 or 1.398 I rounded the numbers is my answer right??? If not what's the right answer??
December 23, 2010 by Tarkan

chemistry hw
SOMEONE PLEASE HELP AND CONFIRM THE RIGHT ANSWER FOR ME...I HAVE ONE MORE ATTEMPT TO THIS PROBLEM AND I NEED HELP!!!!! PLEASE!!!!!!!!!!!!!!!!!!!! THANKS! In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied ...
February 19, 2012 by Ariel

chemistry
Commercial bleach contains 5.25% (by mass) of NaClO in water. It has a density of 1.08 g/mL. Calculate the molarity of this solution.
March 3, 2010 by Drew

Genral chemistry
if you dissolve 1.60g of Cu(No3)2 in 100mL of water, calculate the molarity of the resulting solution ?
March 30, 2011 by Abdul

Chemistry
Calculate the molality, molarity, and mole fraction of FeCl3 in a 39.2 mass % aqueous solution (d = 1.238 g/mL).
February 16, 2013 by Stevi

chemistry
calculate the molality, molarity, and mole fraction of NH3 in an 12.80 mass % aqueous solution (d=0.9651 g/ml)
September 8, 2014 by maria

Chemistry 2
Calculate the molality, molarity, and mole fraction of FeCl3 in a 25.7 mass % aqueous solution (d = 1.204 g/mL).
February 12, 2015 by Anonymous

chemistry
a beaker contains 75.6 grams magnesium oxide (MgO) in 175 ml of solution, calculate the molarity?
May 18, 2015 by kedron

Biology
what can you say about the amount of hydrogen ions relative tot he amount of hydroxide ions in a solution that has a pH of 2?
December 15, 2015 by Aidan

Chemistry
To extract gold from its ore, the ore is treated with sodium cyanide solution in the presence of oxygen and water. 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) -> 4 NaAu(CN)2(aq) + 4 NaOH(aq)
February 9, 2010 by Amy

chemistry
A solution of iron(III) thiocyanate was produced by dissolving 7.98 milligrams solid iron(III) thiocyanate in enough water to produce a 100.00 mL solution. What is the concentration, in molarity, of the solution?
November 6, 2013 by Anonymous

CHEM
What is the molarity of a calcium sulfate solution prepared by adding 27.89g of CaSo4 to sufficient water to make a final solution volume of 1.00L?
February 7, 2013 by Lisa

Chemistry
Calculate the pH of a solution that is 0.060 M in potassium propionate(C2H5COOK or KC3H5O2) and 0.085 M in propionic acid (C2H5COOH or HC3H5O2)
October 28, 2010 by Anonymous

chemistry
Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 0.140M in propanoic acid and 0.120M in potassium propanoate
November 23, 2014 by Anonymous

Math
Check my answers please. 1. What is the solution to 5 + t = 23 a. 28 b. 18 ** c.-18 d.-23 2. What is the value of b if -7 + b = -8 a. b = 15 b. b = 1 ** c. b = -1 d. b = -15 3. What is the solution to 5q = -75 a. q = -25 b. q = -15 c. q = 15 ** d. q = 25 4. What is the ...
September 2, 2015 by Briona

Chemistry
How would one work through this problem? -Calculate the number of liters of 1.25M solution that can be made from 6.400g of barium nitrate. - I know that it's just stoichiometry, but I'm confused. The formula for molarity is the number of moles of the solute divided by liters ...
May 7, 2016 by Charlie

Chemistry
80.0 grams of KBr is mixed with sufficient water to prepare 1865 mL of solution. This solution is then mixed with 46.3 mL of 0.425 M KCl solution. 12 mL of this mixture is subsequently added to 61.0 mL of distilled water. Calculate the molarity of K+ ions in the final mixture...
March 1, 2011 by Christian

metro
Calculate the pH of the buffer solution that results when 10 mL of 0.10 M NaH2PO4 is added to 3 mL of 0.05 M NaOH.
March 17, 2010 by pat

chemistry
Calculate the pH of a solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M benzoic acid (Ka = 6.5 x 10 -5
March 15, 2011 by haley

Chemistry
Calculate the volume of 0.3MHCL used to neutralise NaOH solution
March 25, 2013 by Chris

AP CHEM
A solution formed by mixing 13.0 mL of 0.013 M Ba(OH)2 with 31.0 mL of 7.0 ✕ 10-3 M NaOH. Calculate [OH-]
February 17, 2015 by Jordyn

Chemistry!!
A chemist wants to prepare a stock solution of H2SO4 so that a sample of 20.00mL will produce a solution with a concentration of .50 M when added to 100.0mL of water. A)what should the molarity of the stock solution be? B)If the chemist wants to prepare 5.00L of the stock ...
April 22, 2013 by Anonymous

chemistry
8.00g of NaOH are dissolved in water to make 4.00 of solution. What is the concentration of hydronium ions, , in this solution?
November 2, 2009 by katy

chemistry
8.00g of NaOH are dissolved in water to make 3.00 L of solution. What is the concentration of hydronium ions, , in this solution?
November 15, 2009 by leo

chem101
a 0.1M NaOH solution has been prepared for you.Describe how you would prepare 1 litre of the same solution
April 11, 2010 by kabelo

Chemistry
What is the pH and pOH of a solution that was made by adding 400mL of water to 350mL of 5.0x10^-3 M NaOH solution?
May 12, 2011 by Jackie

Chem 111
Why would NaOH solution need to be added when preparing the K2CrO4 stock solution
January 31, 2013 by Bandar

chemistry
You have 14.0mL of a 0.12M NaOH solution. How many moles of HCl will it take to neutralize this solution?
March 1, 2015 by Savannah

Chemistry
6.00 g of NaOH are dissolved in water to make 4.00 L of solution. What is the concentration of hydronium ions, [H3O+], in this solution?
July 25, 2015 by Serge

chemistry
a 10.0 ml sample of a hcl solution is titrated with 32.6 ml of a 0.155 m naoh solution. what is the equation for the neutralization reaction?
November 22, 2015 by lakeisha

Chemistry
Prepare 0.03 mole fraction solution of NaOH in water Total volume of solution is 100ml
October 21, 2016 by Faisal

chemistry
what is the [OH-] in a solution that contains 0.225g of NaOH in 0.250 L of solution
January 25, 2013 by sofia

science
how many ml of 6M HCl solution are required to bring the pH of 10 ml of a 4M NaOH solution to 2.0
January 21, 2016 by Razakou Maman

chemistry
how many ml of 6M HCl solution are required to bring the pH of 10 ml of a 4M NaOH solution to 2.0
January 21, 2016 by Razakou Maman

chemistry
a sample of 20.0 mL of 0.100 M HCN (Ka=6.2*10^-10) is titrated with 0.150 M NaOH. a) what volume of NaOH is used in this titration to reach the equivalence point? b) What is the molar concentration of CN- at the equivalence point? c) What is the pH of the solution at the ...
January 8, 2013 by Anonymous

chemistry
Al2(SO4)3+6KOH-->2Al(OH)3+3K2SO4 a)How many grams of potassium hydroxide are needed to completely react with 870 mg of aluminum sulfate? b)If you want to make 7.00 grams of potassium sulfate, how many grams of aluminum sulfate would you need to react? c)How many grams of ...
April 29, 2013 by ashley

Biology
What can you say about the amount of hydrogen ions relative to the amount of hydroxide ions in a solution that has a pH of 2?
September 9, 2010 by John

Biology
What can you say about the amount of hydrogen ions relative to the amount of hydroxide ions in a solution that has a pH of 2?
November 22, 2015 by Malcolm

Molality
An aqueous solution contains 8.7% NaCl by mass. 1. Calculate the molality of the solution. 2. Calculate the mole fraction of the solution.
January 30, 2010 by Kyle

Gen. Chemistry lab
Trying to find mass percent of acetic acid in 25 drops of .683M NaOH solution are required to neutralize 10 drops of cleaning vinegar. Assume that the density of the cleaning vinegar is the same as the density of regular vinegar which is 1.05 g ml-1 You need to clean up the ...
March 3, 2007 by Toni

Chemistry Lab
You need 123 mL of 0.245 M NaOH solution for a certain experiment, and the only solution available in the lab is 1.252 M. How many mL OF THE 1.252 M NaOH would you need?
May 10, 2011 by Thao

Chemistry
What is the normality of a solution which contains 4.03-g of sodium carbonate in 300.-mL of solution?
May 22, 2013 by Megan

science
What is then volume in mL of then solution 3.04g of sodium chloride from a 0.110 M solution?
September 29, 2013 by samantha

chemistry
normality of a solution containing 2g sodium carbonate in 250mL solution
November 23, 2016 by silpa

Chemistry
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.23 solution.
March 23, 2012 by Jematormal91

chemistry
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.23 solution.
April 10, 2013 by sara

Chemistry
A solution of household bleach contains 5.25% sodium hypochlorite, NaOCl, by mass. Assuming that the density of bleach is the same as water, calculate the volume of household bleach that should be diluted with water to make 500.0 mL of a pH = 10.10 solution.
May 29, 2013 by JayJay

College chemistry
A buffered solution is made by adding 50.0 g NH4Cl to 1.00 L of a 0.70 M solution of NH3. Calculate the pH of the final solution. (Assume no volume change.)
March 10, 2010 by Nikita

Chemistry
How many milliliters of 0.250 M sodium hydroxide are needed to titrate 35.0 mL of 0.425 M hydrofluoric acid?
December 1, 2011 by Victoria

chemistry
How many moles of sodium hydroxide are needed to react with 148.0 g of Iron (III) bromide?
April 12, 2013 by Taylor

math Steve form your help
50gm of a mixture of ca(OH)2 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 % purity of ca(OH)2 The answer 41.35% Who helps me step by step
December 29, 2013 by Fai

Chemistry 2
Calculate the molarity of the following aqueous solution of 25.0 grams of MgBr2 in 0.355 L solution? Did I work this right? 25gMgBr2/184.113 gMgBr2 =.1357861748 mol MgBr2 then: .1357861748 mol MgBr2/0.355 L =.382 M
August 8, 2014 by Brandi

chemistry
what final volume in liters of a 2.5 m solution of sodium nitrate can be made using 25.0g of solution
March 15, 2011 by andrew b

Chemistry
Describe how to prepare an aqueous 100 mL stock solution of 2 M sodium chloride solution.
March 22, 2011 by Brittany

Chemistry
1. I have 2% NaCl solution. From this I want to prepare a solution to contain 0.1 g of the sodium compound in 2 mL of water. Thanks
January 18, 2013 by Steve

chemistry
269 mL of a 0.2089 M sodium carbonate (Na2CO3) solution is prepared and labelled "Solution A".
March 22, 2015 by B

Chemistry
A solution contains 0.284 M sodium nitrite and 0.257 M nitrous acid. What is the pH of the solution?
June 24, 2015 by Glenna

Chemistry
50 L of your 0.05M sodium. chloride solution, what volume of 1.25M solution would be necessary?
May 23, 2016 by Blake

Qualitative analysis
Aqueous sodium hydroxide is added to a mixture of an aqueous solution of X with some aluminium alloy. On warming, ammonia gas is evolved. When X is treated with aqueous ammonia, a white precipitate that is soluble in excess aqueous ammonia is obtained. What could be the ...
November 17, 2016 by Cheezel

College Chemistry
A 20.0 Ml sample of sulfuric acid is titrated with 25.0 ML of 1.0 M NaOH solution. What is the molarity of the sulfuric acid? H2SO4+ 2NaOH yields Na2SO4 + H2O
December 6, 2010 by Sa ndra

Chemistry
If a 11.0 mL sample of vinegar (aqueous acetic acid ) requires 19.0 mL of 0.500 M NaOH to reach the endpoint, what is the original molarity of the acetic acid solution?
October 29, 2012 by Erin

Chemistry
If the same solute is dissolved in two different solvents to the same concentration and the same temperature, the osmotic pressure ____ My answer & reason: solution A has a smaller molecular weight and therefore, a larger Molarity and higher osmotic pressure (pi=iMRT) ...
February 25, 2009 by Anonymous

Gen. Chem
To make a solution with a pH = 4.40 a student used the following procedure : a certain amount of sodium acetate along with 0.280 moles of acetic acid is added to enough water to make a solution of 1.00 L How many grams of sodium acetate were added ? Ka = 1.80 x 10 -5
March 22, 2010 by Rinzin

Chemistry
Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage batteries(like a car battery). 1....
January 13, 2011 by K

Chemistry
it takes 37.50 mL of 0.152 M sodium chromate to titrate 25.00 mL of silver nitrate. what is the molarity of the silver nitrate solution
November 15, 2012 by Kendra

chemistry
1) Aqueous solutions of potassium sulfate and ammonium nitrate are mixed together. Which statement is correct? A) Both KNO3 and NH4SO4 precipitate from solution B) A gas is released C) NH4SO4 will precipitate from solution D) KNO3 will precipitate from solution E) No reaction ...
October 15, 2014 by mathew

Chemesitry!
Sodium thiosulfate, Na2S2O3, is used as a fixer in photographic film developing. The amount of Na2S2O3 in a solution can be determined by a titration with iodine, I2, according to the equation: 2Na2S2O3(aq) + I2(aq) --> Na2S4O6 +2NaI(aq). Calculate the concentration of the ...
October 5, 2012 by Anonymous

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