Question

Please express 12.5% in weight/volume. Please choose all that apply.

a) 12.5 g/100 mL
b) 12.5 g/50 mL
c) 125 g/1 L
d) 12.5 g/200 mL

Answer 1

The correct options to express 12.5% in weight/volume are (a) 12.5 g/100 mL and (c) 125 g/1 L, as both represent the same concentration.

Step-by-step explanation:

To express 12.5% in weight/volume, we want to find how many grams of a substance are in 100 mL of solution. Since 12.5% weight/volume is the same as saying 12.5 grams of substance per 100 mL of solution, option (a) 12.5 g/100 mL is correct.

For the other options, here's how they match up with the 12.5% weight/volume:

• Option (b) 12.5 g/50 mL would represent a 25% weight/volume concentration, which is double the desired 12.5% concentration.
• Option (c) 125 g/1 L is equivalent to 12.5 g/100 mL because 1 L is 1000 mL. So, this option also correctly represents a 12.5% weight/volume concentration.
• Option (d) 12.5 g/200 mL would represent a 6.25% weight/volume concentration, which is half of what we want.

Therefore, the correct representations of 12.5% weight/volume are options (a) and (c).