25-04-2022 Year 10 Chemistry Quiz 8 - C4 Chemical Calcs Pt 2

Concentration is

• the amount of solute in the solvent

• the amount of solvent in the solute

• density

• particle size

Which solution is more concentrated?

Solution 1:

500 mL of water

100 g of salt

Solution 2:

500 mL of water

90 g of salt

• Solution 1

• Solution 2

• They have the same concentration

• I have no idea

In order to dilute a solution, you need to

• add more of the solid

• add more water

• find the mass

• find the volume

Calculate the number of moles in 2dm³ of 0.05 mol dm^-3 HCl

• 0.025

• 0.05

• 0.1

• 0.2

Calculate the concentration in mol dm^-3 of 0.400 moles of HCl in 2dm³ of solution.

• 0.2

• 0.8

• 20

• 80

If phenolphthalein turns bright pink, it indicates

• an acid 
• a base
• a neutral

What is this piece of apparatus called

• Pipette

• Burette

• Janette

• Cuvette

What is this piece of apparatus called

• Pipette

• Burette

• Janette

• Cuvette

What is the average titre needed for neutralisation?

• 25.2cm³

• 59.7cm³

• 25.0cm³

• 25.4cm³

Why is indicator added to a titration?

• To test for acids

• to show the endpoint

• to prove a reaction has happened

• to show a colour