Question

If 5 liters of a solution are 20% acid, how much of the solution is acid?

Answer 1

The amount of acid in the solution is obtained by multiplying the volume by the percent acid composition of the solution. 
                          amount of acid = volume x percent composition
Substituting,
                         amount of acid = (5 L) x (0.20) = 1 L
Therefore, the answer of 1L.

Answer 2

Answer:

1 liter of the solution is acid

Step-by-step explanation:

It is very important to know that the 5 liters represents the 100% of the total solution. When a percentage is asked, you could use the rule of three for finding the portion, it is the 20% of the total.

5L   ------>   100%

x   ------>   20%

From previous, x equals 20% multiplied by 5L and divided by 100%

$x=\frac{(5L)\cdot (20\%)}{100\%}$

After performing the corresponding operations, we get x=1L

Thus, 1 liter of the solution is acid