дано
V(HCL) = 50 mL
W(HCL) = 5%
p(HCL) = 0.98 g/mL
V(AgNO3) = 40 mL
W(AgNO3) = 10%
p(AgNO3) = 1.02 g/mL
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m(AgCL)-?
m(HCL) = V(HCL)*W(HCL)*p(HCL) / 100% = 50*5*0.98 / 100 = 2.45g
M(HCL) = 36.5 g/mol
n(HCL) = m/M = 2.45 / 36.5 = 0.07 mol
m(AgNO3) = V(AgNO3) * W(AgNO3) * p(AgNO3) / 100%
m(AgNO3) = 40*10*1.02 / 100 = 4.08 g
M(AgNO3) = 170 g/mol
n(AgNO3) = m/M = 4.08 / 170 = 0.024 mol
n(HCL) > n(AgNO3)
HCL+AgNO3-->AgCL↓+HNO3
n(AgNO3) = n(AgCL) = 0.024 mol
M(AgCL) = 143.5 g/mol
m(AgCL) = n(AgCL) * M(AgCL) = 0.024 * 143.5 = 3.444 g
ответ 3.444 г