Alaboratory technician needs to make a 72-liter batch of a 20% acid solution. how can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10% to get the desired concentration?

8 L of 100% pure acid and 64 L of 10% acid must be combined

Step-by-step explanation:

According to the dilution law,

where,

= concentration of pure acid solution = 100 %

= volume of pure acid solution = x L

= concentration of another acid solution= 10%

= volume of another acid solution= (72-x) L

= concentration of resulting acid solution = 20 %

= volume of resulting acid solution = 72 L

Putting the values in the equation:

Therefore, the laboratory technician must take 8 L of 100% pure acid and (72-8) = 64 L of 10% acid to get 72-liter batch of a 20% acid solution.