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Question

If 500mL of a 5M solution is diluted to 1500mL, the molarity of the dilute solution is:

A
1.5M
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B
1.66M
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C
0.017M
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D
1.59M
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Solution

The correct option is B 1.66M
If 500 ml of solution is diluted to 1500 ml of solution. The morality can be calculated by the formula M1V1=M2V2

Where as M1=5M, V1=500, V2=1500 and M2=?

5×500=1500×M2

M2=2500/1500

=1.66M

Hence the molarity is 1.66M

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