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What would be the resulting molarity of a solution made by dissolving 25.4 grams of KOH in enough water to make a 985-milliliter solution? Show all of the work needed to solve this problem.
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What would be the resulting molarity of a solution made by dissolving 25.4 grams of KOH in enough water to make a 985-milliliter solution? Show all of the work needed to solve this problem.

User Gayle
by
8.5k points

1 Answer

3 votes
Hey there !

Molar mass KOH = 56.1056 g/mol

1) Number of moles :

n = m / mm

n = 25.4 / 56.1056

n =0.452 moles

Volume in liters :

985 mL / 1000 => 0.985 L

Therefore:

M = n / V

M = 0.452 / 0.985

=> 0.458 M
User Jonell
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8.0k points
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