Question

What will be the molarity of a solution containing 5g of sodium hydroxide in 250ml solution?

Answer 1

》》Answer《《

C= n/v

n= m/M = 5g/40 =1/8= 0.125moles

C=n/v = 0.125/0.25 = 0.5

so the answer is a) 0.5M

Answer 2

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Answer:

$molarity \: = \frac{given \: mass}{molar \: mass \: \times \: volume} \\ \\ = \frac{5 \times 1000}{40 \times 250} \\ \\ = \frac{10}{20} \\ \\ = 0.5 \: M$

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