GCSE Chemistry - How to Calculate Concentration in grams per decimetre cubed #30

The video tutorial explains how to calculate the concentration of a solution in grams per decimeter cubed. It introduces the concept of decimeter cubed as a volume measurement equivalent to 1000 centimeters cubed or one liter. The tutorial uses a formula triangle to simplify the calculation of concentration, mass, and volume. It provides examples with sodium hydroxide and copper sulphate to demonstrate concentration calculations and highlights the importance of unit conversion. Additionally, it shows how to calculate mass from given concentration and volume using hydrochloric acid as an example.

What is the formula for calculating concentration?

• Volume times concentration

• Mass times volume

• Mass divided by volume

• Volume divided by mass

In a formula triangle, what operation does the horizontal line represent?

• Subtraction

• Addition

• Division

• Multiplication

If you have 24 grams of a substance in 480 cm³ of water, what is the first step to find the concentration?

• Convert 480 cm³ to decimeters cubed

• Add 1000 to the volume

• Multiply the mass by 1000

• Divide the mass by 480

Why is it important to check the units of the figures given in a concentration problem?

• To make the problem more complex

• To ensure the volume is always in liters

• To avoid errors in calculations due to incorrect unit conversion

• To ensure the mass is always in kilograms

How do you calculate the mass of a solute if you know the concentration and volume?

• Multiply concentration by volume

• Divide concentration by volume

• Subtract volume from concentration

• Add concentration to volume