1、选“D”
因为m(胆矾)=0.500L×0.1mol/L×250g/mol=12.5g
对于“C”,加入500mL水后,溶液体积就不是500mL了
2、n(HCl)=a/22.4 mol
溶液质量:a/22.4 mol×36.5g/mol+1000g=(36.5a/22.4+1000)g
溶液的体积:(36.5a/22.4+1000)g÷bg·cm-3=(36.5a+22400)/22.4b mL
=(36.5a+22400)/0.0224b L
c(HCl)=a/22.4 mol÷(36.5a+22400)/0.0224b L=1000ab/(36.5a+22400) mol/L
3. 0.1mol/L×0.250L=V×1.04g/ml×36%÷60g/mol
V=4.0mL