* Weight / Weight percent may be changed to a Weight / Volume percent by using the follow formula:
A. FORMULA:
% W / V = % W / W x Specific Gravity of % W / W Acid
Note: The % W / W is converted to a % W / V because the specific gravity of the % W / W acid is normally on the bottle in which it is issued.
Example:
1. How many ml of hydrochloric acid ( 36.5 % w / w) would be needed
to make on liter of dilute hydrochloric acid ( 10% w/v)
The specific of HCl = 1.18)
Solve:
% W / V = %
W / W x Specific Gravity of % W / W Acid
% W / V = 36.5
x 1.18
% W / V = 43
Therefore:
36.5% W / W = 43 % W / V
Then
V C = V1 C1
V ( 43% W / V) = 1000 ml ( 10% W / V)
V (43)
= 10,000 ml
V
= 232.6 ml
