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April 18, 2014

Search: A 500 mL saturated solution of calcium fluoride at 25C is evaporated to dryness, yielding 8.00 x 10-3 grams of solid CaF2. What is the Ksp of CaF2 at 25C?

Number of results: 40,301

chemistry
So we have prepared 19.0 g glucose in 100 mL. We now have a 19/100 = 0.19 g/mL (that is, 0.19 g glucose per mL solution). We take a 20 mL sample of that and place a container. How many g glucose did we transfer? We transferred 0.19 g/mL x 20 mL = 3.8 g to the container. Now we...
Sunday, February 28, 2010 at 2:08pm by DrBob222

chemistry
A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?
Friday, September 3, 2010 at 3:06pm by Ethan

Chemistry
The tin (II) fluoride in a 10.000 g sample of toothpaste is extracted into solution and them a precipitate of lanthanum (II) fluoride (LaF3) is formed by the addition of a lanthanum (III) nitrate solution. If the mass of the lanthanum (III) fluoride precipitate is 0.105g, what...
Monday, July 29, 2013 at 11:37am by Colby

chemistry
A 150-mL sample of a .600-mol/L calcium nitrate solution is mixed with a 1.00L of .500-mol/L NaOH(aq). Calculate the mass of precipitate produced in this reacton.
Friday, May 18, 2012 at 8:02pm by Lizzy

Chemistry
If 36 g of potassium chloride are dissolved in 100mL of water at 40 C to form a saturated solution, how many grams of potassium chloride would be required to form a saturated solution in 250 mL of water at the same temperature?
Wednesday, May 26, 2010 at 6:18pm by Anonymous

Chemistry (reposts#2)
A solution is prepared by dissolving 5.00 g of ferric chloride in enough water to make 500.0 mL of stock solution. A 50.0 mL aliquot (portion) of this stock solution is then removed and added to 75.0 mL of water. Calculate the concentrations of all ions in the final solution.
Friday, October 25, 2013 at 8:22pm by Anonymous

chemistry
What is the molar solubility of Sr3(AsO4)2 and the concentration of Sr^+2 and AsO4^-3 in a saturated solution at 25C? the Ksp is 1.3 E -18. Show the balanced reaction.
Sunday, June 10, 2012 at 3:11pm by Chloe

Chemistry
John has 300 mL of 0.65 M NaCl solution. Mary has 500 mL of 0.35 M solution. What is the concentration of the solution if they pour them together
Sunday, November 21, 2010 at 3:59am by Tracy

chemistry
An experiment in your laboratory requires 500 mL of a .0200 M solution of Na2CO3. You are given solid Na2CO3, distilled water and a 500 mL volumetric flask Describe how to prepare the required solution showing all calculations and describing each step appropriately.
Sunday, March 14, 2010 at 6:09pm by Jennifer

chemistry
An experiment in your laboratory requires 500 mL of a .0200 M solution of Na2CO3. You are given solid Na2CO3, distilled water and a 500 mL volumetric flask Describe how to prepare the required solution showing all calculations and describing each step appropriately.
Tuesday, November 15, 2011 at 1:23am by Jennifer

physics
200.0 mL of 0.750 M calcium nitrate is added to 100.0 mL of 0.500 M ammonium sulfate. What is the mass in grams of precipitate formed?
Saturday, June 25, 2011 at 3:16am by Anonymous

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
Tuesday, October 11, 2011 at 8:13pm by TROUBLED

Chemistry
A 230.-mL sample of a 0.280 M CaCl2 solution is left on a hot plate overnight; the following morning, the solution is 1.10 M. What volume of water evaporated from the 0.280 M CaCl2 solution?
Friday, June 21, 2013 at 12:26pm by Ashley

chemistry
6.67 mL of 18.0 molar sulfuric acid solution was dissolved in enough water to make 500 mL of solution. The molarity of the diluted solution is
Monday, October 31, 2011 at 12:29am by Anonymous

Chemistry
The capacity of a large irregularly shaped vessel cannot be computed from geometric data. As a result, it is decided that the volume be established from analytical data. The vessel is filled to its capacity mark with calcium-free water. A known small amount of a concentrated ...
Monday, April 28, 2008 at 2:22am by Gabby

chemistry
Hopefully, Dr. Bob222 corrects this if this is wrong. The maximum mass of calcium iodate that can dissolve in a 10L solution of calcium sulfide can not exceed the number of moles of calcium sulfide in the 10L solution. Therefore, solve for the number of moles in the solution. ...
Tuesday, January 29, 2013 at 3:50pm by Devron

Chemistry
In an experiment to measure the solubility of Ba(OH)2 x 8H2O in water, an excess of solid Ba(OH)2 x 8H2O was stirred with water overnight. the saturated solution was allowed to stand until all the undissolved solid had settled. a 10.00mL sample of the clear supernatant liquid ...
Thursday, October 25, 2012 at 11:43pm by Anne

chemistry
Who knows? 30% in 200 mL solution means 60 g isopropyl alcohol with enough water added to make a total volume of 200 mL of solution. That will be 200-60 = 140 mL water IF (and ONLY IF) the volumes of isopropyl alcohol and water are additive. I expect they are not. For example...
Sunday, March 27, 2011 at 8:30pm by DrBob222

chemistry
What mass of calcium carbonate is precipitated out when 2.20 g of ammonium carbonate is added to 25.7 mL of a 4.00 M solution of calcium nitrate?
Tuesday, November 29, 2011 at 8:41pm by James

chemistry
The pH of saturated is found to be 13.12. A 15.0mL sample of saturated Sr(OH)2 is diluted to 250.0mL in a volumetric flask. A 15.0 mL sample of the diluted Sr(OH)2 is transferred to a beaker, and some water is added. The resulting solution requires 27.6mL of a HCl solution for...
Monday, April 11, 2011 at 5:04am by chips ahoy

Chemistry
Express the concentration of a 0.0860 M aqueous solution of fluoride, F, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
Tuesday, February 21, 2012 at 1:55am by Heather

chemistry
You need to prepare 500.00 mL of a 0.25 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get the desired 0.25 M solution?
Monday, October 4, 2010 at 1:39am by j

chemistry
You need to prepare 500.00 mL of a 0.15 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get the desired 0.15 M solution
Sunday, October 10, 2010 at 2:29am by lulu

chemistry
I did (2.8333mol x 120mL x 2mol FeCl3)/ (1000ml x 6mol) got .113332mols and converted to mL by You are right to here with 0.1133 moles FeCl3. Then M = moles/L and rearrange to L = moles/M = 0.1133/4.43 = 0.02558 L = 25.58 mL. However, there is a flaw in the problem. Since you ...
Friday, June 4, 2010 at 9:08pm by DrBob222

Buffer Solution
You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?
Wednesday, April 13, 2011 at 12:42am by Nicole

chemistry
How many grams of calcium chloride would you dissolve in water to make a total .111 M calcium chloride solution with 200 mL final volume?
Tuesday, July 13, 2010 at 4:30pm by fiath

Chemistry
If by volume you mean mass/volume, you take 40 g bleach and add to to water to make 100 mL solution. Of course that's for 100 mL solution so you multiply everything by 5 to obtain 500 mL. If you have pure bleach and you mean volume/volume, take 200 mL bleach and make to 500 mL
Tuesday, April 14, 2009 at 10:16pm by DrBob222

Chemistry
50 mL of a 2.5 M solution of ammonium phosphate is added to 100 mL of 1.5 M solution of calcium nitrate. At the end of the reaction 11.2 grams of solid product were obtained. Whats the % yield of this reaction?
Sunday, April 17, 2011 at 8:03pm by Hillary

Chemistry
A saturated Ni(OH)_2_ can be prepared by dissolving 0.239 mg of Ni(OH)_2_ in water to make 500.0 mL of solution. What is the Ksp for Ni(OH)_2_?
Thursday, March 15, 2012 at 11:17pm by Shane

chemistry
10.5 g is in a 100; therefore, 10.5/100 = 0.105 g/mL. Now take 60.0 of that solution is diluted to 500 mL. So we have 10.5 g/mL x 60 mL = xx grams and that divided by 500 = yy g/mL. Now multiply that by 100 to know how much is in 100 mL. Check my thinking.
Tuesday, October 6, 2009 at 7:13pm by DrBob222

Chemistry
A .600 g sample of CaCO3 is disolve in concentrated HCl (12M). the solution was diluted to 250 mL in a volumetric flask to obtain a solution for standardizing the EDTA titrant. 1 What is the molarity of the Ca2+ (calcium ion) in the flask? 2 How many moles of Ca2+ are in a 25 ...
Monday, April 12, 2010 at 4:49pm by pem

Chemisty
You're in luck. Here is a web page that lists the solubility from zero C to 100 C for HUNDREDS of salts, including KNO3 and NaCl. This information will allow you to answer the questions you posted. Use the first one I answered as a template. Remember, if the solubility is ...
Monday, August 1, 2011 at 3:28pm by DrBob222

Please Help Fast
10.5 g/100 mL = 0.105 g/mL. You took 20 mL which contains 20 x 0.105 g/mL. Now you diluted that 20 to 500 so the 500 now contains 20 x 0.105 g/mL = 2.10 g so you now have 2.10/500 mL = 0.00420 g/mL. How much is in 100 mL of that solution?
Thursday, February 12, 2009 at 12:29am by DrBob222

Chemistry
........Ca(OH)2 ==> Ca^2+ + 2OH^- I.......solid........0.......0 C.......solid........x.......2x E.......solid........x.......2x Ksp = 6.5E-6 = (Ca^2+)(OH^-)^2 6.5E-6 = (x)(2x)^2 = 4x^3 Solve for x = [Ca(OH)2] in mols/L Convert that to grams/500 mL. g = mols x molar mass ...
Sunday, November 18, 2012 at 9:10pm by DrBob222

Chemistry
A solution contains an unknown amount of dissolved calcium . Addition of 0.112 mole of K3PO4 causes complete precipitation of all the calcium. How many moles of calcium were dissolved in the solution?
Saturday, May 14, 2011 at 5:09pm by Katie

Chemistry
c1v1 = c2v2 c = concn v = volume For example. You have 2M NaOH and you want to make 500 mL of 0.25M. How much of the 2M stuff do you take? 2M*x mL = 0.25M*500 mL mL = (0.25*500/2) = 62.5 mL So you take 62.5 mL of 2M NaOH, add to 500 mL volumetric flask and make to the mark. ...
Wednesday, January 16, 2013 at 10:41pm by DrBob222

Chemistry
A solution is prepared by adding 300 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? Kb for ammonia is 1.8 x10 -5
Monday, October 4, 2010 at 10:11pm by Taylor

Chemistry
Ca(OH)2 has a Ksp of 6.5 x 10^-6. If 0.37 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated? pls help me I stayed up all last night trying to get this one question :(
Sunday, November 18, 2012 at 9:10pm by Kevin pls it's due at midnight :(

Chemistry
What volume of a .500 M HCl solution is needed to neutralize each of the following: 10 ml of a .300 M NaOH solution 10 mL of a .200 M Ba(OH)2 solution
Tuesday, March 8, 2011 at 3:13am by Monty

Chemistry
work out the [OH-], [H+] and pH of the solution formed when 0.500L of 0.250 M hydrochloric acid solution is mixed with 0.500 L of a 0.250 M calcium hydroxide solution.
Sunday, July 22, 2012 at 3:11am by Megan

Chemistry Help Please :)
I'm stuck on how to do these 4 problems concerning Chemical Equilibriums. When varsol and iodine/pottasium iodide solutions are mixed, the two phases form.. phase A (top) would be pink and phase B (bottom) would be brown. What are the colours in each phases for these 4 ...
Sunday, February 12, 2012 at 6:29am by Alexis

Honors Chemistry
An aqueous solution of NaCl has a concentration of .500 M. 35.0 mL of this solution is allowed to evaporate to a volume of 20.0 mL. a) Is the solution more concentrated or more dilute afterwards? b) What is the new concentration of the solution?
Friday, May 4, 2012 at 1:13am by Lou

Chemistry
A saturated solution at 25 C contains 10g of kclo3 in 50 ml of water. At what temperature does the solution become unsaturated?
Monday, February 13, 2012 at 5:03pm by Mingma

chemistry
How many mL of a 4.7 M HNO3(aq) solution are required to make 500 mL of a solution with pH=2.10
Sunday, June 12, 2011 at 12:31am by amanda

Could someone help me proofread?
I think you should know that eggshell and teeth consist of quiet different chemical actually, eggshell is 94-97% Calcium carbonate while teeth is 98% Calcium Phosphate..Calcium phosphate (hydroxyapatite) react with fluoride and formed Fluoroapatite, which is stronger to acid ...
Thursday, December 28, 2006 at 2:13am by Donna

chemistry
What volume of WATER MUST BE ADDED to 10.0 mL of 6.0 M NaOH to make a solution that is 0.30 M in NaOH? Assume that the volumes are additive. a. 10 mL b. 190 mL c. 200 mL d. 210 mL e. 500 mL
Monday, March 29, 2010 at 6:30am by lawrence

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

pharmacy calculations
prepare 500 ml of a 1:5 solution using a 1:10 solution and a 1:4n solution. what quantities will be used of each stock solution to make the 1:5 solution?
Friday, August 3, 2012 at 1:08pm by cleondra

science
If you have 0.50M Ca(NO3)2 solution, how many mL of this solution must be evaporated to obtain 32.8 grams of solid Ca(NO3)2?
Wednesday, November 3, 2010 at 1:17am by Makena

CHEMISTRY
A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT COMPLETELY WITH THE CALCIUM HYDROXIDE IN THE FOLLOWING REACTION? Na2CO3(aq)+ Ca(OH)2(aq)CaCO3(s)+2NaOH(aq)
Tuesday, October 23, 2012 at 5:34pm by HAMZA

pharmacy math
if 500 ml of a 15% solution is diluted to 1500 ml, how would you label the final strength of the solution?
Friday, December 7, 2012 at 1:37pm by cleondra

chemistry
A solution is saturated with Ag2CrO4. a) Calculate [CrO4^2-] in this saturated solution. b) What mass of AgNO3 must be added to 0.635 L of the solution to reduce [CrO4^2-] to 1.0* 10^-8M?
Monday, March 19, 2012 at 11:24am by Justin

Chem
You made up a saturated solution of calcium sulfate (CaSO4). The temp is 25 degrees Celsius. You then add 5.00*10^-3 of sodium sulfate (NaSO4). What are the concentrations of calcium and sulfate after equilibrium is reached? The pKs of CaSO4 is 4.58. I know the Ks of CaSO4 to ...
Sunday, June 5, 2011 at 8:33am by Mig

CHEMISTRY
A 2.800-g mineral sample was analyzed for its calcium carbonate, CaCO3, content by titrating it with hydrochloric acid (the reaction products are calcium chloride, carbon dioxide, and water). The sample required 28.48 mL of a 0.1505 M HCl solution to react completely. ...
Sunday, November 28, 2010 at 7:45pm by Anonymous

Chemistry
What are the units for crying out loud? Are all of them 100 mL. I will assume that is what you meant except for the dilution which I assume is 0.500 L or 500 mL. 14 g/100 = 0.14 g/mL You took 55 mL of that so you have in the aliquot of 55 mL exactly 0.14 g/mL x 55 mL = 7.70 g...
Monday, February 8, 2010 at 10:54pm by DrBob222

Chm
What is the molarity of a saturated solution of potassium sulfate if the solubility is 13 g per 100 g H2O at 25C? The density of the solution is 1.1 g/mL
Thursday, January 17, 2013 at 6:04pm by Chris

Chemistry
c1v1 = c2v2 50*?mL = 0.5 x 500 mL Solve for ?mL. Add ?ml stock to a 500 mL volumetric flask and make to the mark.
Friday, October 12, 2012 at 5:15pm by DrBob222

chem
Question: The American Dental Association recommends that an adult female should consume 3.0mg of fluoride (F-) per day to prevent tooth decay. If the fluoride is consumed as sodium fluoride (45.24% F), what amount of sodium fluoride contains the recommended amount of fluoride...
Monday, October 1, 2007 at 3:54am by leo

Chemistry
Use the dilution relationship (Mi x Vi = Mf x Vf) to calculate the volume of 0.500 M NaOH needed to prepare 500 mL of .250 M NaOH. This is my work ? L Solution = 500mL x (1L/1000mL) = .500L ? mol NaOH = .500 L Solution x (0.250 M NaOH/1 L Solution) = .125 mol NaOH ? L solution...
Saturday, February 28, 2009 at 9:35pm by Bob

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?
Saturday, December 11, 2010 at 5:28pm by Mark

chem
15% w/w means 15 g H2SO4/100 g solution. That's 15 g H2SO4/(15 g H2SO4 + 85 g H2O) BUT that doesn't tell us the volume of that 100 grams of solution. I don't know how much solute is in 500 mL because I don't know what 500 mL weighs. You need the density of the SOLUTION. The ...
Thursday, November 29, 2012 at 10:51am by DrBob222

Buffer
You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?
Monday, April 11, 2011 at 4:54pm by Nicole

AP Chem
A 3.50 g sample of KCl is dissolved in 10.0 mL of water. The resulting solution is then added to 60.0 mL of a 0.500 M CaCl2(aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution. *confused*
Monday, November 3, 2008 at 7:37pm by Anna

chemistry
Under an O2(g) pressure of 1.00 atm, 30.9 cm3 of O2(g)at 25C dissolves in 1.00 L H2O at 25C. Assuming that the soln volume remains at 1.00L, what is the Molarity of a saturated O2(aq) soln at 25C when partial pressure O2=1 atm? DRBOB222 said to: Convert 30.9 cc O2 at 25C to ...
Wednesday, August 31, 2011 at 11:20am by Holly

chemistry
what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride
Wednesday, August 21, 2013 at 1:37am by Emily

Chemistry
Calculate the mass of calcium phosphate that forms when 5.50 x 10 -2 mol of solid calcium chlorate is dissolved in 600.0 mL of 1.00 x 10 -2 M lithium phosphate solution.
Tuesday, February 21, 2012 at 8:27pm by Bella

CHEMISTRY
I didn't answer your original question because it makes no sense. There is no such thing as preparing a molarity solution. You can prepare a MOLAR solution or a TWO MOLAR solution but you can't prepare a molarity solution. You CAN add an maount of material to a certain amount ...
Monday, March 16, 2009 at 9:00pm by DrBob222

Chemistry
17.0 g in 100 mL. 55 mL taken diluted to 500 mL. So the glucose placed in the 500 mL flask is 17.0 x (55/100) = ?? Therefore, the concn (grams/mL) in the 500 mL flask is ??/500 mL. Multiply by 100 if you want the grams/100 mL.
Wednesday, July 7, 2010 at 8:31pm by DrBob222

Chemistry
I'm trying to find the solubility of Ca(OH)2 in .0125 mol/L aqueous NaOH. Here is my data: Vol of solution used per titration: 20mL Conc of HCl: .1201 mol/L Average Titre: 4.71 I need to calculte: 1. the TOTAL [OH-] in the saturated solution of Ca(OH)2 in NaOH 2. the [OH-] due...
Wednesday, April 14, 2010 at 1:49pm by Kristin

Chemistry
12.0 g/100 mL 0riginal. Take a 50.0 mL aliquot so now you have 6.0 g in the 50.0 mL. That is diluted to 500 mL so now you have 6.0 g in 500 mL. If you take 100 mL of that solution you will have 1/5 of 6.0 = ??
Wednesday, September 29, 2010 at 2:54am by DrBob222

Chemistry
A solution is prepared by mixing 100 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? kb for ammonia is 1.8x10-5
Thursday, May 2, 2013 at 5:46pm by Chris

Chemistry
A solution is prepared by mixing 100 mL of 0.500 M NH3 and 100 mL of 0.500 M HCl. Assuming that the volumes are additive, what is the pH of the resulting mixture? kb for ammonia is 1.8x10-5
Thursday, May 2, 2013 at 5:46pm by Chris

Organic Chemistry
What are proper techniques to induce crystallization from a saturated solution? (Select all correct answers.) Allowing the solution to cool down. Scratching the outside of the container with a glass rod. Seeding the solution. Adding a solvent that lowers the solubility of the...
Thursday, April 29, 2010 at 1:42pm by Joanna

Science
Calculate the molarity of the following solution: 7.48g of calcium chloride (CaCl2) in 215 mL of aquous solution.
Friday, October 19, 2012 at 2:30pm by Emily

Science
10.0 g of KCl and 18.5 g of CaCl2 were dissolved in 500 mL of water. How many mL of 1.57 M AgNO3 solution would be required to precipitate all Cl- from the solution?
Friday, October 19, 2012 at 2:31pm by Jared

chemistry
A 25.0 mL solution of HCl has been spilt. It took 21.8 mL of saturated 2.5 M NaOH to neutralise the acid. What was the molar concentration of the acid?
Wednesday, August 7, 2013 at 11:42pm by sarah

chemistry
How many grams of potassium fluoride are needed to make 250 mL of a 0.31 M solution in water?
Tuesday, March 29, 2011 at 4:36pm by Anonymous

chemistry
How many grams of potassium fluoride are needed to make 250 mL of a 0.31 M solution in water?
Tuesday, March 29, 2011 at 4:37pm by Anonymous

Chemistry
see same question how many grams nitric acid HNO3 must be dissolved in 350 ml water to make a solution with pH of 4.5"? or "how many ml of a 4.2M nitric acid solution are required to make 500 ml of solution with pH of 2.9
Sunday, May 12, 2013 at 11:29am by kriti

Chemistry
What volume of a 0.332 M hydrobromic acid solution is required to neutralize 29.6 mL of a 0.155 M calcium hydroxide solution ?
Monday, October 22, 2012 at 2:32pm by Kaitlin

Chemistry
A buffer is prepared by mixng 150.0 mL of 0.500 M ammonia, 250.0 mL of 0.200 M ammonium chloride and 600.0 mL of water. To this solution is added 50.0 mL of 0400 M hydrochloric acid. What is the final pH?
Wednesday, December 9, 2009 at 9:37pm by Cathy

Chemistry
I know not how a student would do it but I would use c1v1 = c2v2 0.08500M*500 mL = 0.3180M*v2 v2 = 133.6 mL The way you do this is to pipet or measure accurately 133.6 mL of the stock solution and transfer quantitatively to a 500 mL volumetric flask. Then add distilled water ...
Wednesday, November 21, 2012 at 6:17pm by DrBob222

College Chemistry
The concn of the titrated solution is 0.885M. It came from the 500 mL flask; therefore, it must be 0.885M also. How many moles HCl are in the 500 mL flask? That will be 0.885 x 0.500L = 0.4425 moles. All of those moles came from the 48.70 mL stock solution; thus, the M of the ...
Saturday, December 11, 2010 at 5:28pm by DrBob222

Chemistry
A salicyclic acid (MW= 138.123 g/mol) solution has a pH of 2.43. When 100 ml of this solution was evaporated 0.22g of dry salicylic acid was recovered. What is the Ka of salicylic acid?
Tuesday, March 12, 2013 at 3:25pm by Nina

Chemistry
A salicyclic acid (MW= 138.123 g/mol) solution has a pH of 2.43. When 100 ml of this solution was evaporated 0.22g of dry salicylic acid was recovered. What is the Ka of salicylic acid?
Tuesday, March 12, 2013 at 5:38pm by Nina

chemistry AP
A word or two about your statement of something being heated producing salt and water. That isn't true unless salt was in the water initially. And then salt shows up only if enough water is evaporated to produce a saturated solution.
Tuesday, January 29, 2008 at 8:31pm by DrBob222

chemistry
Your question isn't stated very well. Do you mean something like this? Prepare 100 mL of a 500 mM HCl solution using HCl with a purity of 37% HCl and a density of 1.18 g/mL. If so, the first thing to do is to calculate the molarity of the 37% HCl solution. That will be 1000 mL...
Wednesday, March 30, 2011 at 11:26pm by DrBob222

see this too---chemistry
If you substitute 500 g and 0.500 L the density will be in units of g/L. If you want g/mL or g/cc, you need to substitute 500 g/500 mL = ? g/mL.
Thursday, September 6, 2012 at 7:57am by DrBob222

chemistry
225 mg sample of diprotic acid is dissolved in enough water to make 250mL solution.the pH of this solution is 2.06. a saturated solution of calcium hydroxide Ksp=1.6E-6 Then the saturated solution of calcium hydroxide is prepared by adding excess calcium hydroxide to pure ...
Sunday, March 2, 2008 at 2:09pm by timmathy

chemistry
3.21 g of calcium carbonate is dissolved into 250.0 mL of water to make a homogenous solution. What is the concentration os this solution?
Tuesday, August 28, 2012 at 8:56pm by Meeeee

chemistry
3.21 g of calcium carbonate is dissolved into 250.0 mL of water to make a homogenous solution. What is the concentration os this solution?
Tuesday, August 28, 2012 at 10:17pm by Meeeee

chemistry
280 ppm = 280 g/10^6 g solution. If we call the density of the solution 1.00 g/mL and we ignore the contribution of the mass of the salt to the solution (usually ok since the amount of salt is so small), then 280 ppm = 280 g/10^6 mL which is the same as 0.280 g/10^3 mL = 0.280...
Wednesday, April 21, 2010 at 10:21pm by DrBob222

chemistry
#1, calculate the M of the commercial solution. 1000 mL x 1.20 g/mL x 0.37 = grams HCl/1L grams/molar mass HCl = ?M since that will be moles/L. Then Mconcd x ?mL concd = 0.500M x 2,500 mL Solve for ?mL.
Sunday, November 6, 2011 at 1:16am by DrBob222

Chemistry - help please
In an experiment, when 25 mL of 5.5 x 10^-3 M NaOH is mixed with 30 mL of 7.5 x 10^-3 M Fe(Br)2, a hydroxide compound is formed (Ksp = 1.8 x 10^15). Which of the following describes the resulting solution? a. The product is unsaturated b. The mixture product is saturated c. ...
Tuesday, October 15, 2013 at 12:05pm by Eren

DrBob222-Questions
CaCl2 = Calcium ion and Chlorite ion You named MgCl2 magnesium chloride on the last post. Why would you not name this one calcium ion and chloride ion. Na2O = Sodium ion and Oxygen ion sodium ion and oxide ion AgCl = silver ion and chlorine ion silver ion and chloride ion ...
Tuesday, April 20, 2010 at 11:39pm by DrBob222

Chemistry
A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3 ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M
Tuesday, February 8, 2011 at 1:06pm by Paul

Chemistry
A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3 ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M
Wednesday, February 9, 2011 at 9:26am by Paul

Chemistry
230mL of .280M solution contains 0.0644 moles CaCl2 x L of 1.1M solution now contains the .0644 moles, so x = 0.0585 = 58.5 mL so, subtract to find the difference, which evaporated.
Friday, June 21, 2013 at 12:26pm by Steve

chemistry
There is a discrepancy in your Ksp. You have E-7 in the problem but you substituted E-9. Check to make sure that is ok. When you solve for x, that gives you the solubility CaCO3 in moles/L. I obtained about 7E-5 M and that x molar mass CaCO3 = about 7E-3 or 0.007 g CaCO3/L ...
Monday, November 14, 2011 at 9:44pm by DrBob222

Chemistry
Hi, my question is: "Classify each of the following as saturated, supersaturated, or unsaturated: KNO3 90g/100g at 82*C NaCl 36g/100g at 23*C KCl 35g/100g at 18*C NaNO3 90g/100g at 28*C How do I determine if they are saturated, supersaturated, or unsaturated? Since the ...
Sunday, June 11, 2006 at 1:51pm by Waleed

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