Use of amount of substance in relation to masses of pure substances

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Question 28
Medium

All alkalis show similar chemical properties due to the presence of a specific ion.

a.

State the chemical formula of the ion present in all alkalis.

[1]
b.

A student prepares a solution of potassium hydroxide (KOH\text{KOH}KOH) with a concentration of 28 g/dm3. Calculate the mass of KOH\text{KOH}KOH that would be present in 150 cm3 of this solution.

[3]

Use of amount of substance in relation to masses of pure substances Questions

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