a, NaCl + AgNO3 -> AgCl + NaNO3
n NaCl=150×2÷1000=0,3 mol
nAgNO3=100×1÷1000=0.1 mol
=> 0.3/1>0.1/1=>NaCl dư
Ta có : 0.3/1-0.1/1=0.2 mol
=> m NaCl dư=0.2×(23+35.5)=11.7 g
b,Theo pthh nAgCl=nAgNO3=0.1 mol => mAgCl=0.1(108+35.5)=14.35 g
c,n NaNO3=0.1 mol => CMNaNO3=0.1/0.25=0.4 M
CMNaCl dư=0.2/0.25=0.8M