Question

(9) JUL
3. What will be the molarity of a solution, which
contains 5-85 g of NaCl(s) per 500 mL ? the answer will be 5.8

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Answer 1

Answer:

0.2mIL

Explanation:

Molarity, M= number of moles/volume of solution

M=

V

n

Number of moles, n= mass/molar mass

Molar mass of NaCl=58.5 g/mol

Mass = 5.85g

n=5.85/58.5=0.1 mol

Volume, V=500 mL=0.5 L

∴M=0.1/0.5=0.2mol/L

Hence, option C is correct.