11. III. IV. You will perform the following 5 groups of reactions: Mix each of the following with NaOH a. CaCl2 b. BaCl2 c. CuCl₂ d. MgCl2 e. NH CI f. Fe(NO3)2 Mix each of the following with KCI a. Pb(NO3)2 b. AgNO3 c. NaNO3 d. Fe(NO3)3 Mix each of the following with Na2SO4 a. Pb(NO3)2 b. AgNO3 C. BaCl2 d. KCI Mix each of the following with Na2CO3 a. CaCl2 b. BaCl2 c. CuCl₂ V. d. NH4Cl Mix each of the following with CuSO4 a. Na2CO3 b. Na3PO4 c. Na₂S

To a beaker with 500 mL of water are added 95 mg of Ba(NO3)2, 95 mg of Ca(NO3)2, and 100.0 mg of Na2CO3. After equilibrium is established, will there be • no precipitate? • a precipitate of BaCO3 only? • a precipitate of CaCO3 only? • a precipitate of both CaCO3 and BaCO3? Assume that the volume of the solution is still 500.0 mL after the addition of the salts.

5:23 O13%DE elearning.yu.edu.jo/m O A student was given 2 beakers labeled with numbers 1 and 2, each beaker contains a clear solution. Additionally, he was given two reagent bottles labeled with A and B. Now, he added reagent A to both beakers and he noticed the formation of a precipitate in beaker 2 but not in beaker 1. However, the addition of reagent B to both beakers resulted in the formation of a precipitate in beaker 1 but not in beaker 2. Based on the information, which of the following is correct? a. compound A is the limiting reactant in beaker 1. b. compound B is the limiting reactant in beaker 2. c. compound A is the limiting reactant in beaker 2. d. compound B will be the excess reactant in beaker 1. Question 2

a. When 15.0 mL of a 7.68×10-4 M sodium hydroxide solution is combined with 22.0 mL of a 4.94×10-4 M aluminum sulfate solution does a precipitate form? fill in the blank 1 (yes or no)?For these conditions the Reaction Quotient, Q, is equal to . ? b. When 15.0 mL of a 4.98×10-4 M potassium hydroxide solution is combined with 22.0 mL of a 3.15×10-4 M cobalt(II) bromide solution does a precipitate form? fill in the blank 1 (yes or no)For these conditions the Reaction Quotient, Q, is equal to ? c. When 12.0 mL of a 8.52×10-4 M iron(III) fluoride solution is combined with 12.0 mL of a 3.18×10-4 M sodium sulfide solution does a precipitate form? fill in the blank 1 (yes or no)For these conditions the Reaction Quotient, Q, is equal to ?

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If 500.0 mL of 1.2 x 10-3 M Pb(NO3), are added to 500.0 mL of 2.0 x 10-4 M Na2S, what will take place? Kgp(PbS) = 7 x 10-29 O a precipitate of Pb(NO3)2 forms. O a precipitate of Na,S forms. O a precipitate of PbS forms. no precipitate forms. O a precipitate of NaNO3 forms.

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solid P6CO3 is at equilibrium with its ions ? A) The concentration of CO ions in solution is is wrong for 500 mL of saturated solution in which 1.6 x 1015. Which one of the following statements 12. The solubility product for PbCO3 at 25°C is for 500 mL of saturated solution in which is wrong PbCO3 = 267 g/mol A) The concentration of CO3 ions in solution is %3D 4x10-8 M. B) The maximum mass of P6CO3 dissolved in solu- -3 tion is 5.34 x 10° mg. C) The solubility of P6CO3 at 25°C is 4 x 10-8 mol/L. D) The total number of ions in solution is 2.4x10-16. E) The concentration of each of Pb<+ and CO, ions at 50°C is 4 x 10-8 M.

Precipitation is happened when ---where Ksp & I.P. are solubility product and ionic product respectively ] O Ksp > I.P. O Ksp = 1.P. O Ksp < 1.P.

Q5: A sample of 0.676g of an unknown compound containing barium ions (Ba+) is dissolved in water and treated with an excess of NazSO. If the mass of BasO, precipitate formed is 0.4105g. What is the percent by mass of Ba in the original unknown compound? Note: Mwt. of Ba =32, Mwt. of BaSo4 =233, Mwt. of Na2SO4=142