【简答题】今有25.00mL KI溶液,用10.00mL0.05000mol/L KIO 3 溶液处理后,煮沸溶液以除去I 2 。冷却后,加入过量KI溶液使之与剩余的KIO 3 反应,然后将溶液调至中性。析出的I 2 用0.1008mol/L Na 2 S 2 O 3 溶液滴定,用去21.14mL,计算KI溶液的浓度。
【单选题】阅读下列文章,选出最佳选项。 We know music is very important in our daily life. Do you notice music is playing at any of those places when you go somewhere? Today most shops, stations, restaurants and other places ...