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August 29, 2016

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

Number of results: 63,192

Chem II
A solution is prepared by dissolving 12.7 g Ca(NO3)2 in enough water to make 100.0 mL of stock solution (molar mass is 164.09-1). What is the molarity of the solution?
January 23, 2013 by vera

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...
April 6, 2011 by John

science
C respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). 'A' dissolved 50 g of NaOH in 100 ml of water B dissolved 50g of NaOH in 100g of water while C dissolved 50g of NaOH in water to make 100ml of ...
August 12, 2015 by akshay

Chemistry
A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was observed. Find the mass of ...
March 19, 2014 by Anonymous

Math
If 2,484 union members represent 90% of a factory's work force how many workers are employed? I used this formula r*b=a, so 90 is my rate; base is unknown and 2,484 is the amount. I divided 90 into 2,484 and came up with 276, but I know this cant be right. The answer is 2,760 ...
June 1, 2012 by **renak

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 ...
May 10, 2007 by Sara

chemistry
determine the molarity of each of the following solutions: a. 20.0 g NaOH in enough H2O to make 2.00 L of solution is the answer .250 M yes
May 16, 2007 by beckz

chemistry
What is molarity of solution made by combining 10.0g of NaOH with enough water to reach a total volume of 2.00L?
November 21, 2011 by Sarah

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

Chemistry Lab
Using the molarity of fromic acid (HCOOH): 0.1033 Calculate the percent by mass of fromic acid in unknown solution. Assume the density of aqueous fromic acid solution is 1.000 g/mL. Need help setting up this problem. Thank you.
May 16, 2011 by Thao

Chemistry HW!!!
1. If I dilute 75 mL of 0.50 M CaF2 solution to a final volume of 375 mL, what will be the molarity of the resulting solution? 2. What will be the final volume of the solution be if I start with a 250 mL of 1.38 M MgCl2 solution to make a solution with a concentration of 0.30 ...
March 11, 2015 by Theresa

Chemistry
2H2+O2 -> 2H20 changeHrxn=-484 KJ Which answer best describes the transfer heat that occurs when 1.30 mol of H2 reacts? 629 KJ released 315 KJ absorbed 315 KJ released 484 KJ absorbed 484 KJ released 629 KJ absorbed
October 9, 2012 by Anonymous

Chemistry
calculate the molar concentration of H3PO4 in the cola sample. Volume of decarbonated cola used 25.00mL, Molarity of NaOH used for titration 0.0100M, and Volume NaOH used at first equivalence point is 14.54mL.
April 10, 2011 by Anonymous

chem
how much volume of naoh required for titration with khp to the equivalence poin
October 29, 2014 by nazee

Chem Urgent
Volume of stock solution a. 5.0mL b.10.0mL c.15.0mL d.20.0mL Prepare 25mL of each of the four different dilute solution Concentration of stock- 1.01E-5 Calculate molarity for a,b,c,d Molarity=m1V1/V2 for a would the answer be 2.02E6????? (1.01E-5)(5.0)/(25.0)
November 16, 2007 by Aman

Chemistry
What is the molarity of this dichromate solution? A potassium dichromate solution of an unknown molarity was used to titrate a solution of FeSO4 prepared by dissolving a 0.350g of pure iron wire in H2SO4 and reducing the FE3+ produced to FE2+. 36.24 mL of the dichromate ...
December 2, 2012 by ANONYMOUS

chemistry
If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, 1.)what is the balanced equation for this reaction? 2.) what is the ...
April 13, 2014 by Alison

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 ...
February 16, 2007 by christine

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
November 26, 2011 by Jessica

Chemistry
in this experiment you are you will begin by preparing a dilute soultion of sodium hydroxide by taking 50 ml of 3 M NaOh stock solution and diluting it with 250 ml of water. i found that and the answer was .5 but how do i do this b. calculate the number of moles and grams of ...
February 23, 2010 by Chris

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.
May 6, 2013 by Marsha

Chemistry
A sample of solid monoprotic acid with molar mass equal to 137.9 g/mol was titrated with 0.1879 M sodium hydroxide solution. Calculate the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL.
October 8, 2007 by Raj

chemistry
calculate the volume of mL of a 1.420 M NaOH solution required to titrate the following solution. 25.00 mL of a 1.500 M H3PO4 solution
October 11, 2011 by TROUBLED

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.
May 11, 2008 by caleb

chemistry
A solution of fructose, C6H12O6, a sugar found in many fruits, is made by dissolving 22.0 g of fructose in 1.00 kg of water. What is the molal concentration of fructose the solution? What is the mole fraction of fructose in the solution? What is the mass percent of fructose in...
March 13, 2015 by Anonymous

chemistry
If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are titrated with 0.10-M NaOH...
October 26, 2014 by xx

AP Chemistry
(a) What is the pH of a 2.0 molar solution of acetic acid. Ka of acetic acid = 1.8 x 105 (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
A 43.20 mL sample of 0.3260 M sodium hydroxide (NaOH) is required to react completely with 36.70 mL of a phosphoric acid (H3PO4) solution. What is the molarity of the phosphoric acid solution?
January 23, 2016 by T

Chemistry
An organic acid has a percentage composition by mass of C 41.4%, H 3.4%, and O 55.2%. A solution containing 0.250g of the acid, which is dibasic required 26.60 cm cubed of NaOH solution (0.20 mol.dm -3) for neutralisation. Calculate the empirical formula, molecular formular, ...
September 20, 2014 by Manu

Chemistry
The pH of a weak monoprotic acid, HA, is 4.55. It took 39.22 ml of 0.2334 M NaOH to titrate 25.00 ml of the acid. a. Write an equation for the above reaction. b. Calculate the molarity of the weak acid c. Write the equilibrium equation. Construct a table showing initial ...
April 9, 2011 by Cassie

science
A 0.1 M NaOH solution is used for holder 50, or ml of a 0.100 M solution of acetic acid. Calculate the pH of the solution after the addition of 50.0 ml of sodium hydroxide
May 2, 2016 by Anonymous

Chemistry
A 10.0 ml sample of vinegar which is an aqueous solution of acetic acid, requires 16.5ml of a 0.500M NaOH solution to reach the endpoint in a titration (where the moles of acid are equal to the moles of base). What is the molarity of the acetic acid solution?
April 19, 2011 by Brittany

chemistry
An aspirin tablet weighing 0.548 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 ...
May 10, 2007 by jared

Burnett
Write balanced molecular and net ionic equations for the reaction of KHP with NaOH.
October 9, 2011 by Mariah

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 ...
February 22, 2010 by Robert

chemistry
A 10.0-mL sample of vinegar, which is an aqueous solution of acetic acid, CH3COOH, requires 16.5 XML of a 0.500M NaOH solution to reach the endpoint in a titration (where the moles of acid are equal to the moles of base). What is the molarity of the acetic acid solution
May 4, 2011 by Zarion Gibbs

chemistry
Calculate the pH of 0.3 M HCl solution. Calculate the pH when 100 mL of a 0.5 M solution of NaOH are added to 300 mL of the HCl solution.
July 2, 2016 by Anonymous

chemistry
In a coffee cup calorimeter, 50 mL of 0.1 M HCl and 50 mL of 0.1 M NaOH are mixed to yield the following reaction: HCl + NaOH  NaCl + H2O. The two solutions were initially at 22.1 oC and the final temperature is 24.2 oC. Calculate the heat that accompanies this ...
March 16, 2015 by Diana

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)
September 28, 2008 by Kelsey

Chemistry - PLEASE HELP!!!
25g NaOH is dissolved in 10 ml h20 and added to 100 ml volumetric flask. Calculate the concentration in molarity.
May 17, 2015 by Marie

Chemistry
The number of moles NaOH needed to reach the equivalence point is mol, which means we must add liters of NaOH. The total volume of solution at the equivalence point will be liters. From the above information, the molarity of NaF at the equivalence point is M.
March 13, 2013 by Elizabeth

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 ...
March 24, 2007 by Jim

chemistry
A 47.7-g sample of SrCl2 is dissolved in 112.5 mL of solution. Calculate the molarity of this solution.
November 20, 2010 by Jessica

chem. 7
a 20% solution of H2SO4 has a density of 1.14 g/mL. calculate the molarity, normality and molality of the solution.
December 3, 2010 by Anonymous

chemistry
calculate the molarity of the solution- 0.56 mole of BaCl2 in 100.0mL of solution.
February 8, 2011 by brandy

Chemistry 2
An aqueous solution of CuSO4 has a density of 1.3g/ml and is 1.16 molal. Calculate the Molarity of this solution.
July 15, 2011 by Kelci

chemistry
Calculate the molarity of a solution containing 58.5mg of NaCl in 2.50mL of solution.
November 30, 2012 by Emmanuel

chemistry
Calculate the molarity of a solution that contains 48g of NaCl in 250ml of solution.
February 7, 2013 by James

Chemistry
Calculate the molarity of a solution which contains 0.40 mol of a substance dissolved in 1.6 L of a solution.
March 8, 2016 by Jasmine

Chemistry
Which of the following solution should be mixed with 50.0 mL of 0.050 M HF solution to make an effective buffer? A) 50.0 mL of 0.10 M NaOH B) 25.0 mL of 0.10 M NaOH C) 50.0 mL of 0.050 M NaOH D) 25.0 mL of 0.050 M NaOH
April 1, 2012 by Anon

chemistry
Calculate the molality of a 2.50 molarity NaCl solution. Density of solution = 1.08 g/ml.
March 4, 2010 by Anonymous

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

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

chemistry
calculate the molarity of a solution in which 22.6g C6H12O6 is dissolved in 1.08L of solution
October 13, 2010 by Stacy

chemistry
Calculate the molarity of a solution prepared by dissolving 25.0 g NaCl in 1.0 L solution.
April 6, 2011 by Marilyn

chemistry
A solution contains 33.3 g H3PO4 in 448 mL of solution. Calculate its molarity.
November 16, 2011 by Anonymous

chemistry
A mixture was formed by adding 4.56g of KCL to water to make 175mL of solution. The density if the solution is 1.12g/mL. Whatis the mass percent and what is the molarity of the potassium chloride solution?
August 8, 2013 by joshua

Chemistry
CONCENTRATION OF NaClO IN COMMERCIAL BLEACH. Bleach comes as 6%(mass/volume) solution of NaClO. Calculate the Molarity of NaClO in bleach to three significant figures ( you need molar mass of NaClO)
February 11, 2013 by Jessica

chemistry
calculate the molarity of a solution containing 0.5050 mol of solute in 400.0 ml of solution
September 13, 2011 by Anonymous

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
December 11, 2011 by anonymous

chemistry
a 20*/* phosphoric acid solution has a density of 1.14g/ml.calculate the molality and molarity of the solution.
September 3, 2012 by logeshwari

science
Calculate the molarity of a solution which contains 6.456g of Na2CO3 dissolved in 250.0 ml of solution.
February 1, 2015 by Steph

Chemistry
Calculate molarity of KNO3 solution if 69 g of salt are dissolved into 250 mL of solution
March 17, 2016 by Marissa

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?
September 4, 2009 by DJ

Physical Sciences
I have a project practical investigation to do and I have no idea how to go about with it. The problem is: Calculate the mass of sodium hydroxide used to prepare a 0,5M NaOH solution in a 250ml volumetric flask. Determine the concentration of the acetic acid solution used (...
August 10, 2012 by Cindy

Chemistry
This question is based on an experiment to determine the mass of ASA. Information from the experiment : ASA is a weak acid with a Ka value of 3.2 x 10^-4. An ASA tablet has an approximate mass of 500 mg. The experiment used a titration with a standardized 0.100 mol/L ...
June 4, 2013 by Kelsey

chemistry
What mass of sodium hydroxide pellets must be poured into a waste drum containing 20.0 L o 3.0 mol/L sulphuric acid to completely neutralize the waste acid solution? Write a balanced chemical equation for this reaction. okay, so here is the work I already did my balanced ...
December 15, 2014 by julie

johnson
Work these titration calculations: 1. A titration of 15.0 cm3of household ammonia, NH3, required 38.57 cm3of 0.78M HCl. Calculate the molarity of the ammonia. 2. What volume of 0.5M HNO3is required to neutralize 25 cm3of a 0.2M NaOH solution? 3. Calculate the volume of 0....
June 18, 2012 by Lemun

Chemistry
Help needed with a calorimeter lab. I have to measure the enthalpy of a neutralization reaction between NaOH and HCl as well as find the concentration of NaOH the following ways. - using the mass and volume of NaOH - Using calorimetric data assuming no heat lost to calorimeter...
November 17, 2014 by Bibi

chemistry structures
what is the stucture for heptanoic acid i need a to draw it CH3CH2CH2CH2CH2CH2COOH http://en.wikipedia.org/wiki/Enanthic_acid Molarity Calculate the molarity of 9.25 mol HCL in 2.25L of solution. mols/L = Molarity
April 4, 2007 by kim

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 ...
March 29, 2011 by pal

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
Calculate the molarity of a solution made by diluting 0.200 L of 1.00M HCl solution to a volume of 1.00 L
November 12, 2010 by Liza

chemistry
calculate the molarity of a solution prepared by dissolving 5g of sodium hydroxide in water to make 1l of solution
May 11, 2011 by dann mavado

science
Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 136 mL of solution.
May 2, 2012 by mollye

Chemistry
Calculate the molarity of 1 lit solution of 93% H2SO4 by weight by volume even the density of solution is 1.84 g/ml
August 10, 2013 by Aman

chemistry
When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0 C in a calorimeter, the temperature of the aqueous solution increases to 33.9 C. Assuming the specific heat of the solution is 4.18 J/(gC), that its density is 1.00 g/mL, and that the calorimeter itself ...
March 14, 2013 by nobody

science
6g of impure NaOH was dissolved in 100ml of a solution.0.25molar solution of the base utilize 27.6ml of the solution containing 6g of trioxonitrate(5)acid.calculate (a)molar concentration of acid (b) molar concentration of base (c) mass of the base (d) % purity of the base
January 19, 2013 by chm 101

Chemistry
Calculate the molarity of the H3PO4 solution?This the question Answer has to be: MH3PO4 = ? mol/L but I don't know how to calculate it. Thanks for help so far
October 26, 2014 by Duke

Chemistry
The molarity of amonia in aqueous solution is 11.8 mole/dmc calculate the amount of fraction of amonia in solution density of solution is 0.916 g/cc
August 10, 2013 by Aman

Chemistry
calculate the molarity of cl- ions in a solution made from mixing 50.0 ml of a 0.100 m/l solution of ferric chloride with 50.0 ml of a 0.500 mol/l solution of ammonium chloride
March 29, 2015 by Amy

intro to chem
The molarity of an aqueous solution of potassium hydroxide, KOH, is determined by titration against a 0.197 M HI solution. If 28.4 mL of the base are required to neutralize 18.6 mL of HI, what is the molarity of the KOH solution?
August 13, 2013 by Meseret

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

chemistry
calculate the molality of one molarity solution of sodium nitrare. the density of solution is 1.25g cm cube.
June 20, 2011 by joyti

chemistry
calculate the molality of one molarity solution of sodium nitrare. the density of solution is 1.25g cm cube.
June 20, 2011 by joyti

Science
Calculate the molarity of a solution formed using 55.4 g of AgNO3 in enough water to form 250 ml of solution.
October 1, 2012 by Megan

Science
Calculate the molarity of the following solution: 7.48g of calcium chloride (CaCl2) in 215 mL of aquous solution.
October 19, 2012 by Emily

chemistry
calculate the molarity of the solution prepared by dissolving 16.45g NH4NO3 in water to make 250.mL solution.
March 16, 2014 by hunter

Chemistry
Calculate the molarity and normality of a solution made by dissolving 50g of Al(SO4)3 to produce 2.5 liter of solution.
July 2, 2016 by Jonalyn

Chemistry
10% (m/m) Sodium Hydroxide solution, NaOH(aq) is used to break down wood fibre to make paper. A) What mass of the solute is needed to make 250mL of 10% (m/m) solution? B) What mass of solvent is needed? C) What is the molar concentration of the solution?
May 2, 2011 by Saman

Chemistry
Calculate the initial molarity of KNH2 and the molarities of K+, NH3, OH-, and H3O+ in an aqueous solution that contains 0.75 g of KNH2 in 0.255 L of solution. You may ignore the reaction of NH3 with water. I already found the initial molarity, but I am not sure how to find ...
February 22, 2010 by Trixie

Grade 11 Chemistry
calculate the molarity of cl- ions in a solution made from mixing 50.0 ml of a 0.100 m/l solution of ferric chloride with 50.0 ml of a 0.500 mol/l solution of ammonium chloride
March 28, 2015 by Sim

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 ...
October 9, 2010 by Allyse

Chemistry
Calculate the molar mass of a diprotic acid. It 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. I keep getting a molar mass of 500g/mol. but the options are all around ...
March 30, 2013 by Katie

Chemistry
Calculate the molar mass of a diprotic acid. It 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. I keep getting a molar mass of 500g/mol. but the options are all around ...
March 30, 2013 by Katie

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...
December 3, 2012 by Need Help

chemistry
15.0 mL of an iodine solution of unknown molarity was titrated against a .001 M solution of S2o32-. The blue black iodine-starch complex just disappeared when 20.2 mL of thiosulfate was added. What is the exact molarity of the Ia solution
April 23, 2015 by chem3a

chemistry - science
calculate molarity of NaOHin the solution prepared by dissolving its 4g in enough water to form 250ml of this solution ?
February 17, 2012 by tania

chem
Calculate the molarity of a solution made by dissolving 0.150 in enough water to form exactly 730 of solution
April 18, 2012 by joe

college chemistry2
calculate the molarity of a solution containing 20.0g of sulfuric acid in 500 ml of solution?in a solving problem form?
August 5, 2012 by raymond benzon

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