FREE BACE Preparing solutions Questions and Answers

Question 1

What is the primary unit of concentration for solutions in a laboratory?

Accepted Answer

Mole per liter (Molarity, M)

Answer

Grams per liter (g/L)

Answer

Milligrams (mg)

Answer

Parts per million (ppm)

Question 2

What is the volume of water needed to prepare a 1 M NaCl solution using 58.44 g of NaCl?

Accepted Answer

1 L

Answer

0.5 L

Answer

2 L

Answer

5 L

Question 3

Which piece of equipment is most accurate for measuring liquid volumes?

Accepted Answer

Pipette

Answer

Beaker

Answer

Graduated cylinder

Answer

Erlenmeyer flask

Question 4

When dissolving a solute in water, what step should be done first?

Accepted Answer

Weigh the solute

Answer

Add water to the final volume

Answer

Stir the solution

Answer

Heat the solution

Question 5

What does "q.s." mean when preparing a solution?

Accepted Answer

Add sufficient quantity of solvent

Answer

Add more solute

Answer

Heat to dissolve

Answer

Quantify the solute