4) What is the molality of a solution in which 0.32 moles aluminum chloride has
been dissolved in 2,200 g water?
5) What mass of water is needed to prepare a 1.20 molal solution using 0.60
mol propyleneglycol?

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answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.