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March 29, 2015

Search: Calculate the molarity of a solution made by dissolving .0715 mol Na2SO4 in enough water to form 650mL of solution

Number of results: 73,856

chemistry
25 mL of standardized 0.45 mol/L NaOH is titrated with 21 mL of 0.35 mol/L acetic acid. Calculate the pH of the solution
April 9, 2008 by unknown

Chemistry
Hi,may I have your help? I have posted a titration question that I'm trying to solve. The correct answer to the problem is 0.128 M, however,I have arrived at the answer: 0.000128 M. Here's the question: If 38.30 mL of 0.250 M NaOH is used to titrate 25.0 mL of phosphoric acid,...
December 10, 2010 by Cliff

Chemistry
A 0.1mol/dm^3 aqueous solution of phosphoric (V) acid, H3PO4, is mixed with a 0.1 mol/dm^3 of aqueous solution of sodium hydroxide. Which mixture will form the salt Na3PO4? a) 10cm^3 of H3PO4 with 30cm^3 of NaOH b) 10cm^3 of H3PO4 with 10cm^3 of NaOH c) 20cm^3 of H3PO4 with ...
October 9, 2009 by Marrion

Chemistry I
Acetone , C3H6), is the main ingredient of nail polish remover. A solution is made up by adding 35.0 ml of acetone (d=0.790g/ml) to 50.0ml of ethyl alchole, C2H6O (d=0.789 g/ml). summing volumes are additive, calculate (a). the mass percent of acetone in the solution. (b). the...
February 26, 2010 by Tim

chemistry
What is the molarity of a solution when 3L of a 4M solution is mixed with 3L of a 6M solution?
March 3, 2009 by lyne

Chemistry
500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?
August 9, 2012 by Natasha

chemistry
A student placed 10.5 g of glucose C6H12O6 in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform...
October 6, 2009 by Cory

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)=4....
March 6, 2011 by Bryant

chemistry
In a coffee-cup calorimeter, 1.91 g of NH4NO3 is mixed with 75.0 g of water at an initial temperature of 25.00oC. After the solution of the salt, the final temperature was 20.94oC. Assuming the solution has a heat capacity of 4.18 J/(goC) and assuming no heat loss to the ...
October 9, 2012 by Shawn

chemistry
4. A 35.0 mL sample of 1.00 M KBr and a 60.0-mL sample of 0.600 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 50.0 mL. What is the molarity of the KBr in the final solution?
May 14, 2013 by tra

chemistry
4. A 35.0 mL sample of 1.00 M KBr and a 60.0-mL sample of 0.600 M KBr are mixed. The solution is then heated to evaporate water until the total volume is 50.0 mL. What is the molarity of the KBr in the final solution?
May 14, 2013 by tra

Chemistry: Molarity
4.82 mL of a 0.262 M NaOH solution reacts completly with 4.79 mL of HCl solution according to the balanced chemical reaction shown below: HCl (aq) + NaOH (aq) -> NaCl*aq) + H2O (I) What is the molarity of the HCl solution? 4.82 x (1L/1000 mL) = .00482L 4.79 x (1L/1000 mL...
March 1, 2009 by Bob

chemistry
Calculate mole fraction of solution made by mixing 46gram alkohol in 360 gram water at given temperature?
March 11, 2013 by Parmvir khipal

chemistry
Calculate mole fraction of solution made by mixing 46gram alkohol in 360 gram water at given temperature?
March 11, 2013 by Parmvir khipal

Chem
(a) The molar solubility of Ag2CrO4(s) at 35C is 1.3 10-4 mol/L. Calculate Ksp. (b) If 0.0490 g of AgIO3 dissolves per liter of solution, calculate the solubility-product constant. (c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in ...
April 27, 2011 by Rebekah

college algebra (maths 112)
To conduct a new experiment, a scientist needs a 23% salt water solution. How much of a 13% solution must be mixed with 45 quarts of a 32% solution to get the proper solution?
February 24, 2011 by Anonymous

science
50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
November 5, 2012 by Maya

science
50 ml of ZnSO4 solution was transferred to a mercury cathode and enough solid potassium nitrate is added to make the solution 0.1 M in KNO3. The electrolysis of Zn2+ is carried to completion of -1.3 V vs. SCE with the passage of 241 C of electricity. calculate the initial ...
November 5, 2012 by Maya

CHEMISTRY
if the [H] of a solution at 25degrees is 1.7*10^-4 mol/L, calculate the [OH] in mol/L, the PH, and the pOH?
May 5, 2012 by nicole

chemistry
1. Find the molality of the solution prepared by dissolving 0.238g toluene, C7H8, in 15.8g cyclohexane 2. A pure sample of the solvent phenol has a freezing point of 40.85 degrees C. A 0.414 molal solution of isopropyl alcohol was observed to have a freezing point of 38.02 ...
February 9, 2015 by kales

Chemistry
Calculate the density of 150g of a 25% by wieght solution of sodium chloride dissolved in water and the volume of solution is 145ml.
January 24, 2012 by Elaine

science
A solution is prepared by mixing 90 ml of 5 M HCl and 30 ml of 8 M HNO3. Water is then added until the final volume is 1 L. Calculate the [H+], [OH-], and the pH for this solution.
February 17, 2015 by polly

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
February 22, 2012 by krystal

Chemistry
A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution solution that 8.5x1^-4 M. 6.60 mL of iodine solution is required to reach the endpoint. 1. How ...
March 12, 2012 by Cassandra

Chemistry
A student has 100.0 mL of an unknown solution of Vitamin C. She removes 1.00 mL of this solution, dilutes it to 50.0 mL, and titrates this second solution with an iodine solution solution that 8.5x1^-4 M. 6.60 mL of iodine solution is required to reach the endpoint. 1. How ...
March 12, 2012 by Cassandra

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 9, 2011 by Kevin

Chemistry!
0.0100 Ba(OH)2 is dissolved in water to give 500.0 mL of solution calculate OH- concentration would it be the molarity of Ba(OH)2 (0.0100 / 0.500) multiplied by two because there is twice as much OH??
August 10, 2008 by Sue Ellen

Chemistry
A 25.00-mL sample of an H2SO4 (2 and 4 are subscripted) solution of unknown concentration is titrated with a .1328 M KOH solution. A volume of 38.33 mL of KOH was required to reach the endpoint. What is the concentration of the unknown H2SO4 (again, the 2 and 4 are subscripted...
January 4, 2010 by coug

Chemistry
A 25.00-mL sample of an H2SO4 (2 and 4 are subscripted) solution of unknown concentration is titrated with a .1328 M KOH solution. A volume of 38.33 mL of KOH was required to reach the endpoint. What is the concentration of the unknown H2SO4 (again, the 2 and 4 are subscripted...
January 4, 2010 by coug

chemistry
A 150.0-mL sample of Solution A is diluted to a total volume of 423 mL to form Solution B. If the concentration of Solution A was originally 20.0 mg/L, what is the concentration (in mg/L) of Solution B?
September 18, 2011 by alex

Science
a 67 gram chunk of ice (Heat of Fusion = 6.0 kJ/mol) in a beaker immersed in a water bath. To produce just enough heat to melt the ice, how many moles of solid NaOH (Heat of Solution = -445.1 kJ/mol) must be added to this system to just melt the ice. (Moles)
January 27, 2014 by Anonymous

chemistry
A solution is prepared by dissolving 10.00 grams of a monobasic salt in a total volume of 1.00 litres. The pH of this solution was measured at 13.07 and a conductivity experiment determined that this salt was completely ionized in solution. What is the molecular weight of this...
January 29, 2014 by Temmi

bio chemistry
calculate the PH of each of the following buffers prepared by placing in 1.0 L of solution 0.10 mol NH3 and 0.10 mol of NH4CL
March 2, 2012 by samar

Chemistry
How can i explain the key features of the periodic table relate to the conclusions after a titration experiment The experiment was the preperation of a standard solution of sodium carbonate and titration for the equation between hydrchloric acid and sodium carbonate Objective...
October 11, 2010 by Paul

Chemistry
0.1 mol NaCl + 0.1 mol KCl would produce a buffer solution if dissolved in water?
May 4, 2010 by Michele

Chemistry
What volume of water should be added to 500 mL of a 1.0 mol/L CuSO4 solution to dilute it to 0.5 mol/L?
May 29, 2012 by Ashleigh

chemistry
what is molar concentration of a solution obtained by dissolving 560cm of hydrogen chloride gas at s.t.p in 92.5cm of water
January 26, 2012 by faith

Chemistry
A student placed 17.0 g of glucose (C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the solution was ...
July 7, 2010 by Tiffany

Chemistry
When 23.6 of calcium chloirde CaCl2 was dissolved in water in a calorimeter, the temperature rose from 25.0 degrees C to 21.56 degrees C. If the heat capacity of the solution and the calorimeter is 1071 J/ degrees C, what is the enthalpy change when 1 mol of sodium nitrate ...
November 1, 2007 by Lauren

chemistry
0.5g of fuming h2s04 oleum is diluted with water. This solution is completely neutralized by 26.7ml of 0.4N naoh. Find the percentage of free s03 in the smaple solution. The answer 20.6% Assume that 50ml of 0.01M edta solution were added to 25ml of solution and the excess edta...
March 3, 2013 by Fai

Math
If a mixture of a 6% acid solution with an 11% solution is to be made, how much of each solution is needed to make 10 liters of an 8% acid solution?
September 2, 2012 by DAD

chemistry
One buffer solution used to calibrate a pH electrode was made by dissolving 2.24g of potassium propanoate, C2H5COOK, in 250cm3 of 0.20 mooll-1 propanoic acid.
October 24, 2012 by Jen

math who helps me step by step
25g of a sample of ferrous sulphate was dissolved in water contains dilute h2s04 and the volume made up to one litre. 25ml of this solution required 20ml of N/10 kmn04 solution for complete oxidation. Calculte the percentage of f2s04 7 h20 in the sample My calculation 0.02 x 0...
January 4, 2014 by Fai

Chemistry
I need to figure out the molarity in the problem. A) 3.60g of sulfuric acid in 450.0mL of solution I was going to take 3.60 / 450.0mL = 0.008 B) 2.0 x 10-3 mol Iron(II)nitrate in 12.0mL of Solution 10 *3=30 then I was going to take 30*2.0 =60 60/12.0= 5 I am not sure if this ...
March 8, 2015 by Leslie Hill

Chemistry
Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution
February 27, 2011 by Kiana

CHEMISTRY
CALCULATE THE MOLARITY OF 50.0g OF NaCL IN 7820mL OF SOLUTION
December 4, 2013 by DAD

Chemistry
Calculate the molarity of 17.g of NaCl in 881 ml of solution
April 13, 2014 by Alexa

chemistry
calculate the molarity of a g NaCl in 250 ml solution.
November 25, 2014 by Zach

Chemistry
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)=4.486x 10^-4 mol -4.486 mol/0.1L= 44.86 M B. ...
March 6, 2011 by Bryant

chmistry
a solutiona solution is made by dissolving 3.75g of a pure nonvolatile solute in 95g of acetone. the boiling point of pure acetone was observed to be 55.95 Centigrade that,and that of the solution was 56.50 Centigrade.if the molar boiling point elevation constant(Kb)of acetone...
November 20, 2012 by bb

chem
A quantity of 16.13 mL of a KOH solution is needed to neutralize 0.4883 g of KHP. What is the concentration (in molarity) of the KOH solution? I don't even know where to begin with the first one. Calculate the amount of heat liberated (in kJ) from 375 g of mercury when it ...
February 26, 2009 by ash

CHEM
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 C when reverse osmosis stops? Mc=? ...
February 19, 2012 by JSJFJF

Chemistry
.050 mole of weak acid (HA) is dissolved in enough water to make 1.0 L of solution. The pH of this solution is 3.50. What is the value of Ka for this weak acid?
April 6, 2012 by Hannah

Chemistry
1. A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. Which reactant is the limiting reactant? 2. A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. How many moles of precipitate form in this reaction?
February 23, 2013 by Eagertolearn

Chemistry
Which is the more concentrated solution: a solution made with .70 moles of NaCl in a .35L water or a 35g of NaCl in .75L?
April 8, 2013 by Alexis

Science
A solution made up of 20ml of mythl alcohol and 50ml of water. What is the volume percent of ethyl alcohol in solution.
July 7, 2014 by Araceli

chemistry
A sample of 10.00g of a solid unknown was dissolved in 25.00g of water. Assuming that pure water freezes at 0.0C and the solution freezes at -5.58C, what is the molal concentration of the solution? What is the molar mass of the solid? Show your calculation. I got that the ...
January 24, 2015 by paula

chem
An aspirin tablet weighing 0.650 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 ...
April 20, 2008 by un

chem
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 ...
April 18, 2011 by CHEMCHEM

chemistry
what solution of sugar in water has the highest molarity?
April 28, 2011 by lilly

science
what is the molarity of a solution of 232 g of NaCl in 2.1 of water?
January 8, 2013 by willie

science
what is Molarity of a solution of 4 moles of NaCl in 2L of water?
January 8, 2013 by willie

chemistry
a solution of oh negative ions is added to a beaker of pure water 25 degrees celcius to a final concentration of 137 nM calculate the ph of the solution
August 31, 2014 by Anonymous

chemistry
a solution of oh negative ions is added to a beaker of pure water 25 degrees celcius to a final concentration of 137 nM calculate the ph of the solution
August 31, 2014 by Anonymous

chemistry
If you made up a solution of NaOH by adding 0.010 mole of solid NaOH to 1.0 liter of distilled water, what would be the pH of the solution?
December 18, 2012 by Monica

science
if a solution is made by adding 83 grams.of soduim hydroxide to 750 ml.of water what is the percent by mass of sodium hydroxide in the solution?
June 26, 2014 by beadeguia

chemistry
The following data were collected at the endpoint of a titration performed to find the molarity of an HCl solution: Volume of acid (HCl) used = 14.4 mL; Volume of base (NaOH) used = 22.4 mL; Molarity of standard base (NaOH) = 0.200 M; What is the molarity of the acid solution...
November 29, 2010 by vin

Chemistry
A buffer containing 1.2169 M of acid, HA, and 0.1431 M of its conjugate base, A-, has a pH of 3.96. What is the pH after 0.0017 mol NaOH is added to 0.5000 L of this solution? I can't figure this out for the life of me, i'm sure its just some simple mistake i'm making but can ...
April 2, 2007 by Rafael

chemistry
a student determines the molar mass of methanol by the method used in this experiment. she found that the equilibrium temperature of a mixture of ice and pure water was .4 degrees Celsius on her thermometer. when she added 10g of her sample to the mixture, the temperature, ...
May 22, 2012 by liz

Chemistry
The empirical formula for Brilliant Blie dye is C37 H34 N2 O9 S3 Na2, and the formula weight is 792.86 g/mol. How would you prepare a 4.73 X 10^-6 M solution of Brilliant Blue dye? How many grams of the dye do you need to add to a 1.00 L of water to make this solution? I have ...
October 12, 2011 by Hannah

Heat of Formation
When 10.00 g of iron is burned in O2(g)to form Fe3O4 (s) , enough heat is generated to raise the temperature of 784 g of water from 18.0 C to 38.0 C. Calculate the heat of formation of Fe3O4 (s) under these conditions in kJ/mol.
November 6, 2009 by Kyle

science
you need to make a 3.5 Molar solution of Ca(OH)2, however, you only want to make 50ml of this Ca(OH)2 solution. How many grams of Ca(OH)2 will you need to weigh out and add to 50ml of water? Mass=VolumeinLiters*Molarity*Molmass
December 12, 2006 by brittany

Chemistry
Titration of a 21.0mL solution of requires 11.0mL of 0.0350M solution. What is the molarity of the solution?
July 19, 2012 by Heather

chemistry
enzoic acid is a weak monoprotic acid with Ka = 6.510-5 M. NaOH(s) was gradually added to 1.00 L of 8.6610-2 M benzoic acid. 1. Calculate the pH of the solution before the addition of the base. 2. Calculate the pH of the solution after the addition of 5.2010-2 mol of NaOH(s).
March 25, 2014 by bekah

chemistry
A is a solution of HCL containing 7.30g/dm3.B is a solution ofX2CO3 containing 10.6g/dm3.assume that average volume of acid is 2.81cm3 and the volume of base is 25.00cm3.from your result and information .calculate (I)concentration of A in mol/dm3(ii)concentration of B in mol/...
May 26, 2014 by john kelechi

chemistry
Find for this reaction as written. (Use 1.0 for the density of the solution and 4.18 as the specific heat capacity.) When 0.129 of is combined with enough to make 53.8 of solution in a coffee-cup calorimeter, all of the zinc reacts, raising the temperature of the solution from...
April 15, 2012 by dtost

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 23, 2010 by Trixie

Chemistry
Compound Z has a MW of 100. Your lab partner weighed 25 grams of compound Z and dissolved it in water to a final volume of 1 liter. a) What is the concentration of the solution expressed as a percentage by weight (w/v)? b) What is the concentration of the solution expressed as...
August 29, 2011 by Ty

chemistry
Calculate the molarity of each of the following solutions. 1. 61.9 g of C2H6O in 3.4 L of solution
March 9, 2011 by Abby

chemistry
Calculate the molarity of 2.05 L of a solution containing 1.51 g of dissolved KBr
February 9, 2012 by jessica

general chemistry
Calculate the molarity of each of the following solutions.70.8 in 2.51 of solution
March 7, 2013 by kelia

chemistry
calculate the molarity of 29.25 grams of NaCl in 2.0 liters of solution
May 28, 2013 by Anonymous

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
What is the pH for the solution made from 11.10 mL of 0.278 M HCl solution mixed with 70.90 mL of 0.1300 M ammonia solution ? Note that the pKa for NH4+ is 9.241 8.94 9.24 8.77 9.72 9.54
May 27, 2010 by Lucinda

Chemistry
Hello. Can I get someone to help me set up these problems? 1.) How many moles of N are there in 2.6 moles of NHO3? 2.) How many moles of C2H6 (g) are consumed when 4.4 mol CO2 (g) are produced? 3) How many milliliters of 0.80 M CuSO4 must be diluted to make 866 milliliters of ...
February 25, 2007 by Nathan

Chemistry
a 23ml H2SO4 solution is titrated by 50 ml 0.10 M NaOH solution, what is the molarity of H2SO4 solution? (Note that H2SO4 is a diprotic acid)
March 14, 2011 by Joel

Chemistry
An aqueous solution of NaCl is 270m. If the density of the solution is 1.20g/ml. Find a) % NaCl by mass b) Molarity of NaCl in the solution.
July 16, 2014 by Arwida

Chemistry
Enough water is added to 0.35 g of benzoic acid to make 1000 mL of solution. What is the pH? Ionization Constant for Benzoic Acid Ka = 6.5 105 Molar Mass Benzoic Acid 122. gmol1 (A) 1.9 (B) 2.6 (C) 3.4 (D) 4.2
April 15, 2008 by LT

Solutions Chem
7) You have a 2.5M solution of Silver Nitrate. It contains 450mL of solution. How many grams of silver would you be able to extract? Cu (s) + 2AgNO3 (aq) -> 2Ag (s) + Cu (NO3)2 (aq) I've gotten this much: M=mol/L 2.5=mol/.45 mol= 2.5*.45 mol=1.125 Silver Nitrate= (Ag=107.9...
April 15, 2011 by Sarah

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
The molarity of Sr2+ in a saturated solution of SrSO4 was determined to be 0.000500 M. Calculate the solubility product constant (Ksp) for SrSO4. SrSO4(s) = Sr^2+(aq) + SO4^2- (aq) Molar Mass (g/mol) SrSO4 183.68 This is what I know: Ksp = [Sr][SO4]
March 31, 2010 by Angel

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 k1. ...
August 7, 2007 by Vic

Chemistry
A calorimeter contains 30.0 mL of water at 11.0 degrees C. When 1.50 g of X (a substance with a molar mass of 65.0 g/mol) is added, it dissolves via the reaction: X (s)+H2O (l) ---> X (aq) and the temperature of the solution increases to 26.0 degrees C. Calculate the ...
June 21, 2012 by Abby

CHEMISTRY
Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may represent C9H7NH+ as HB+ and...
November 28, 2012 by sabrina: Please help

CHEMISTRY
Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is quinoline, an organic base with pKb = 6.24 at 298 K. If you like, you may represent C9H7NH+ as HB+ and...
November 28, 2012 by sabrina: Please help

Chemistry
A volume of 150mL of 0.35M HCl is to be prepared from 80% HCl stock solution. (Density of HCl = 1.191g/mL). Calculate the molarity of 80% HCl stock solution.
August 9, 2013 by K

chemistry
) A chemist dissolves 1.000 x 103 g of potassium hydroxide in enough water to make 1.5 L of stock solution. The chemist later wants 2.00 x 102 mL of 0.10 M potassium hydroxide. How much stock solution does the chemist need in order to make this second solution?
May 28, 2014 by Anonymous

chemistry
A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. what is the molality of that solution? I know what formula to use, but can someone please show me all the steps to get the answer. Thanks:)
April 6, 2008 by Miley

Chemistry
In a lab we are trying to find the percent yield of NaCl collected after evaporating the water off an NaCl solution. We made up a .100 M NaCl solution, and used 10. mL of it in our experiment. We know that the empty evaporating dish and cover mass 68.9132 +/- .0003 g, and ...
October 9, 2006 by Chris

Chemistry
Can you check if this is correct please? a) How many moles of sodium hydroxide are there in 19.00 cm3 of 0.100 mol dm3? My answer: 0.0019 mol b) How many moles of hydrochloric acid are, there in 25.00 cm3 of the acid solution? My answer: 0.0019 mol c) How many moles of ...
October 16, 2011 by Franky

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