Chemistry-C5

Weakest Topics

Precipitation reaction of Barium Chloride and Sodium Sulfate...

How can you tell it is a precipitation reaction?

What is a spectator ion?

What is the ionic equation for the precipitation reaction of Barium Chloride and Sodium Sulfate?...

Test for sulfate ions...

Test for halides...

What makes water hard?

Why is hard water difficult to lather?

What is scum?

How can you avoid scum with hard water?

What determines how hard of soft the water will be?

Why is some water hard and some soft?

Where is water hard and soft?

How can you measure hardness in water?

Explain the process of this titration...

Types of hardness...

What do these results show?

Distilled water 0.1

A 6.4

A after boiling 1.6

B 3.8

B after boiling 3.8

Explain temporary hardness...

Explain permanent hardness...

What are the benefits of hard water?

What are the disadvantages of hard water?

How can you soften hard water?

How does adding sodium carbonate soften water?

How does ion exchange soften water?

Reaction of magnesium with acids...

Reaction of calcium carbonate with acids...

How can you determine the amount of gas produced?

Explain why a weak acid reacts with calcium carbonate slower than a strong acid does, but still produces the same amount of gas under the same conditions...

Number of moles=

Relative Molecular Mass (Mr)

Relative atomic mass (Ar)

Percentage Composition by Mass

Concentration

Concentration triangle

Converting moles per dm3 to grams per dm3

Gas Volumes

Strong acid...
(eg, hydrochloric acid)

Weak acid...
(eg, ethanoic acid)