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Question

What volume of water would be needed to dilute 50mL of a 3M HCl solution to 1M?

A
25mL
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B
50mL
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C
75mL
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D
100mL
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E
150mL
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Solution

The correct option is A 100mL

When performing a dilution you can use the relationship:

M1V1=M2V2

Where:

M1= Molarity of the original solution

V1= Volume of the original solution

M2= Molarity of the final solution

V2= Volume of the final solution

Substituting:

50×3=1×V2

V2=150ml.

This is the final Volume.

Therefore, you need 100 ml of water to make a final volume of 150 because 50 ml comes from the Original Volume of 3M HCl.


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