hupeng257 | 四级 的答案有误
Na2B4O7+2HCl+5H2O==4H3BO3+2NaCl
c(HCl)=2m(Na2B4O7 •10H2O) / V(HCl)M(Na2B4O7 •10H2O)
= 2*0.4709 g/(25.20 * 10^-3 L* 381.37g/mol)
=0.0980 mol/L 注意有效数字
hupeng257 | 四级 的答案有误
Na2B4O7+2HCl+5H2O==4H3BO3+2NaCl
c(HCl)=2m(Na2B4O7 •10H2O) / V(HCl)M(Na2B4O7 •10H2O)
= 2*0.4709 g/(25.20 * 10^-3 L* 381.37g/mol)
=0.0980 mol/L 注意有效数字