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CHEMISTRY

JAMB 2007 - Question 50

Chemistry 2007 JAMB Past Questions - Question 50: What weight of NaCL is needed to make 2.0dm-³ of a 1.5M solution?.

Choose the correct answers from the options given.

What weight of NaCL is needed to make 2.0dm-³ of a 1.5M solution?.

A: 116 g

B: 175 g

C: 87 g

D: 58 g

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Correct Answer

Explanation

molar mass of NaCL = 58.solution 5g, 1.0M solution of NaCL therefore 1.0M solution of NaCL will contain 58.5 x 15; therefore 2.0 dm³of 1.5M solution will contain 2x 87.75g175.5g of Nacl.175.32 grams of NaCl is needed to make 2.0dm-³ of a 1.5M solution.