Question

Calculate how much 95% ethyl alcohol will be required to dissolve 0.3g of sulfanilamide at 78�C. Use the values 78 deg C: 180 mg/ml and 0 deg C: 10 mg/ml

Answer 1

1.67mL of 95% ethyl alcohol are required to dissolve completely the sulfanilamide

Step-by-step explanation:

Solubility is defined as the amount of substance that a determined amount of solvent can dissolve

As you can see, 95% ethyl alcohol at 78°C can dissolve 180mg of sulfanilamide per mililiter. That means solubility is 180mg/mL = 0.180g/mL.

As you want to dissolve 0.3g, you require:

0.3g * (1mL / 0.180g) =

1.67mL of 95% ethyl alcohol are required to dissolve completely the sulfanilamide