Number of results: 1,678
Use Le' Chatelier's Principle. a solution at equilibrium: BaCrO4(s)<> Ba^2+(aq)+ Cr)4^-(aq)recall: 2CrO4^2-(aq)+ 2H^+(aq)<> Cr2O7^2-(aq) +H20 2CrO4^2- yellow Cr2O7^2- orange Make predictions about colour changes or changes in the number of states a) To a solution ...
Thursday, March 5, 2009 at 12:44am by Sandra
Some comments below. Don't forget to predict what happens to the colour of the supernatant (aqueous phase) and if you can the pH. a) To a solution of 5 drops of 0.3 M K2CrO4 and 2 drops of 0.3 M NaOH add 0.1 M Ba(NO3)2 until a change is noted. MY PREDICTION: a yellow ...
Thursday, March 5, 2009 at 12:44am by Dr Russ
How many moles of sodium chloride must be added to an aqueous solution that contains 2.0 moles of silver nitrate in order to precipitate 0.50 moles of silver chloride? A) 0.25 mol B) 0.50 mol C) 1.0 mol D) 2.0 mol E) 1.5 mol The answer is B. I have no idea what to do. I was ...
Sunday, March 22, 2009 at 4:59pm by Jill
IN my experiment, I was doing a qualitative analysis of Group I and II anions using a flowchart. IN the chart I added 5 drops of 0.1M AgNO3 and several drops of 3M HNO3 to 5 drops of solution and found that a precipitate was formed. Thus it was classified as a Group I anion. ...
Sunday, April 12, 2009 at 9:34pm by David
Solid Na2SO4 is added to a solution which is 0.014 M in Pb(NO3)2 and 0.041 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 10-8 for PbSO4 and Ksp = 1.2 10-5 for Ag2SO4. (a) Which compound precipitates first? 1 PbSO4 (b) What is the concentration of the first ion ...
Monday, May 11, 2009 at 3:52pm by Andre
you have 157.5 mmol of AgNO3 and 243 mmol of MgCl2. From the balanced chemical equation, 1 mol of MgCl2 would consume 2 moles of AgNO3. It would then require 315 mmol of AgNO3 to completely consume the MgCl2. Therefore, AgNO3 is the limiting reactant and it would dictate how ...
Sunday, June 7, 2009 at 9:48pm by smiley
oops sorry :S I meant Cromate. Potassium Dichromate. In a lab that I did I mixed 0.1 M K2CrO4 with 2 drops of NaOH and I added Ba(NO)2 until I noticed a color change. When I did this, the K2CrO4 which was initally yellow formed a white precipitate and on the top there was ...
Wednesday, July 22, 2009 at 12:18am by Lena
For these problem, I know how to solve it, but I have some issues with the formula. I know that, I need to write down the formula first, and then I need to balance the equation, then I can solve it. So, can anyone please check my formula? You don't have to solve the problem ...
Thursday, September 10, 2009 at 4:10pm by hh
6) How many moles of precipitate are made when 0.03 mol of iron(III) chloride reacts with an excess of silver nitrate? FeCl3 + AgNO3 -------------> I have no idea how to write this equation ==> AgCl + Fe(NO3)3 7) How many moles of aluminum metal does it take to react ...
Thursday, September 10, 2009 at 4:10pm by DrBob222
Please help me....are these questions right or no? If not can you help me...any suggestions please? 7.(14). Which of the following is a salt? a. HNO3 b. H2SO4 c. CaSO4 d. NaOH e. NH3 I put down C- CaSO4, is that right or am I way off track? 8.(15). Which of the following is a ...
Tuesday, October 6, 2009 at 1:57pm by Taylor
Your answer is close to a factor of 10 off but I don't understand most of what you did. Here is how I would do it, following DrWLS' response. moles AgNO3 = M x L = 0.32 x 0.120 = 0.0384 moles. moles K2CrO4 = M x L = 0.32 x 0.040 = 0.0128 moles. How much AgNO3 must we have if ...
Friday, January 29, 2010 at 1:50am by DrBob222
When 50 mL of 1.0 M AgNO3 is added to 50 mL of 0.50 M HCl, a precipitate of AgCl forms. After the reaction is complete, what is the concentration of silver ions in the resulting solution? (a) 0.50 M (b) 1.0 M (c) zero (d) 0.25 M (e) 0.75 M How do I go about solving this? I ...
Monday, February 1, 2010 at 8:30pm by Anonymous
By means of what single reagent could you distinguish between the following? (Tell what happens to each substance.) Solutions: AgNO3 and Zn(NO3)2 H2SO4 and HNO3 Ag(NH3)2Cl and AgNO3 Solids: AgCl and ZnCl2 AgCl and Hg2Cl2 PbCrO4 and K2CrO4
Thursday, February 4, 2010 at 12:36pm by Becky
You're supposed to use your knowledge of chemistry to answer these. The first one, AgNO3 and Zn(NO3)2. Add NaCl. The AgNO3 reacts with NaCl to produce a white insoluble precipitate of AgCl. Zn(NO3)2 and NaCl does nothing. So the secret is to know the solubility tables. Where a...
Thursday, February 4, 2010 at 12:36pm by DrBob222
Chem Pre-Lab HELP!
I'll do #1. Step 1. Write the molecular equation. AgNO3(aq) + NaCl(aq) = AgCl + NaNO3 Step 2. If a reaction occurs, it is because a. a precipitate forms (an insoluble material forms). For this you need to know the solubilities of the salts. Here is a simplified chart for ...
Tuesday, February 23, 2010 at 9:52pm by DrBob222
KClO3 decomposes to KCl and O2 which it escapes. A sample of KClO3 that has had some decomposition will contain some KCl. A sample of this mixture could be dissolved in water and tested with AgNO3. Pure KClO3 would not produce a precipitate since AgClO3 is soluble in water. ...
Monday, March 29, 2010 at 6:18pm by GK
A student is given a sample in lab which contains one of the ions listed below. After adding a few drops of AgNo3 solution to part of the unknown sample, the student got a greyish precipitate. After adding a few drops of Mg(NO3)2 solution to another part of the unknown sample ...
Tuesday, April 6, 2010 at 12:34am by Sam
A solution is prepared that has [NH3]=1.00M and [Cl-]=0.100M. How many grams of AgNO3 can be dissolved in 1.00L of this solution without a precipitate of AgCl(s) forming? Ksp of AgCl = 1.8x10^-10 Kf of [(Ag(NH3)2)+] = 1.6x10^-7
Wednesday, April 14, 2010 at 12:57am by Jeannie
Can Anyone Help Me With This Solubility Problem? An aqueous solution of 1.90 M AgNO3 is slowly added from a buret to an aqueous solution of 0.0100 M Cl- and 0.250 M I-. a) Which ion, Cl- or I-, is the first to precipitate? b) When the second ion begins to precipitate, what is ...
Wednesday, April 21, 2010 at 3:36am by anonymous
Can Anyone Help Me With This Solubility Problem? An aqueous solution of 1.90 M AgNO3 is slowly added from a buret to an aqueous solution of 0.0100 M Cl- and 0.250 M I-. b) When the second ion begins to precipitate, what is the remaining concentration of the first ion? ...
Wednesday, April 21, 2010 at 5:26pm by anonymous