准确称取基准物NaCl 0.1362克,溶于水后以K2CrO4为指示剂,用待标定的AgNO3溶液滴定至终点,用去22.52ml,计算AgNO3溶液的准确浓度.已知NaCl的摩尔质量是58.44g/mol.
问题描述:
准确称取基准物NaCl 0.1362克,溶于水后以K2CrO4为指示剂,用待标定的AgNO3溶液滴定至终点,用去22.52ml,计算AgNO3溶液的准确浓度.已知NaCl的摩尔质量是58.44g/mol.
答
c(AgNO3)=(0.1362/58.44)/0.02252=0.1035mol/L