What is molarity of a solution containing 10 g of NaOH in 500 mL of NaOH solution?

Question

Molar mass NaOH = 40 g/mol#

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Answer 1 · 2018-03-13T14:52:34

$"0.5 molar"$

Molarity is a concentration term in which the no. of moles and the volume are related.

$"Molarity" \ (c) = ("no. of moles" \ (n))/("volume in L" \ (V))$

Here

$n = "10 g"/"40 g/mol"$

$V = "500 mL"= "0.5 L"$

So

$c=n/V$

$= "10 g"/("40 g/mol" \ xx \ "0.5 L")$

$= "10 mol"/"20 L" = "0.5 molar"$