举报
激发大家v从
标定0.1摩尔每升的盐酸,一般盐酸的体积给20-30ML
如果盐酸的体积是20mL
Na2B4O7·10H2O + 2HCl=2NaCl +4H3BO3 +5H2O
38 2
x 0.1mol/L*20mL
x=1mmol
需要硼砂的质量=381.37g/mol*1mmol=0.4g
如果盐酸的体积为30ML
Na2B4O7·10H2O + 2HCl=2NaCl +4H3BO3 +5H2O
38 2
x 0.1mol/L*30mL
x=1.5mmol
需要硼砂的质量=381.37g/mol*1.5mmol=0.6g