We need to add 7.5 mL of distilled water to the 1% m/V HCI solution available.
The percent concentration is one of the common units of concentration that could be used to describe the amount of substance. Let us now try to obtain the volume needed.
Given that;
C1V1=C2V2
C1 = initial concentration
V1 = Volume of the stock solution
C2 = final concentration
V2 = volume of the new solution
Thus;
V1 = C2V2/C1
V1 = 0.25 * 10/1
= 2.5 mL
Hence, the volume of distilled water needed = 10mL - 2.5 mL
= 7.5 mL
Thus, we need to add 7.5 mL of distilled water to the 1% m/V HCI solution available.
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