Question

# When solutions of silver nitrate and calcium chloride are mixed, silver chloride precipitates out of solution...

When solutions of silver nitrate and calcium chloride are mixed, silver chloride precipitates out of solution according to the equation

2AgNO3(aq)+CaCl2(aq)→2AgCl(s)+Ca(NO3)2(aq)

1. What mass of silver chloride can be produced from 1.97 L of a 0.285 M solution of silver nitrate?

2.The reaction described in Part A required 3.62 L of calcium chloride. What is the concentration of this calcium chloride solution?

Q1.

calculate mol of Silver nitrate, AgNO3

mol = MV = 1.97*0.285 = 0.56145 mol of AgNO3

then..

ratio is 2:2 or 1:1 with reswpect to AgNO3 and AgCl

so

mol of AgCl = 0.56145mol

MW of AgCl = 143.32 g/mol

mass = mol*MW = 0.56145*143.32 = 80.467014 g

Q2.

V = 3.62 L of CaCl2 solution...

relate to mol of CaCl2

2:1 ratio of AgNO3:CaCl2

so

0.56145 mol of AgNO3 --> 1/2*0.56145 = 0.280725 mol of CaCl2

then

molarity was:

M = mol/V = 0.280725 /(3.62) = 0.0775483 M of CaCl2