一道ap化学题.50.which of the following represents acceptable labo
一道ap化学题.
50.which of the following represents acceptable laboratory practice?
A.adding a weighed quantity of solid acid to a titration flask wet with distilled water.
B.using 10 ml of standard strength phenolphthalein indicator solution for titration of 25 ml of acid solution.
50.which of the following represents acceptable laboratory practice?
A.adding a weighed quantity of solid acid to a titration flask wet with distilled water.
B.using 10 ml of standard strength phenolphthalein indicator solution for titration of 25 ml of acid solution.
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你能帮帮他们吗