S3 SIS 7.1 Acids and Bases

Presentation

•

Chemistry

•

6th - 8th Grade

•

Medium

Zhang Loh

Used 2+ times

FREE Resource

21 Slides • 15 Questions

Word Cloud

What are some examples of acids you have learnt from lower secondary?

Type response here

Demo

Poll

Predict your observations when a blue and red litmus paper is dipped onto solid citrus acid.

Blue litmus paper turns red.

Red litmus paper remains red.

Blue litmus paper remains blue.

Red litmus paper turns blue.

No change for both litmus paper.

Multiple Select

Which of the following substances are acids?

CH₄

CH₃COOH

NH₃

HNO₃

What are alkalis?

Multiple Choice

All bases produce hydroxide ions when dissolved in water.

True

False

Drag and Drop

Acids are proton

.

Bases are proton

.

Alkalis are

bases.

Acids dissociate in water to produce

ions.

Alkalis dissociate in water to produce

ions

Drag these tiles and drop them in the correct blank above

acceptors

donors

soluble

hydrogen

hydroxide

insoluble

givers

positive

negative

Multiple Choice

Which statement is true?

All bases are alkalis.

All alkalis are bases.

How can we measure the acidity of a solution?

What does pH mean?

Drag and Drop

The

the concentration of H+ ions, the the

pH of the solution

The

the concentration of OH- ions, the

the pH of the solution.

Drag these tiles and drop them in the correct blank above

higher

lower

Multiple Choice

A neutral solution contains no hydrogen and hydroxide ions.

True

False

Fill in the Blanks

How can the pH of a solution be measured?

Type answer...

Multiple Choice

A student is given four different colorless solutions and tests them using three common indicators. The results are recorded in the table.

Which of the following statements were true?

Solution W is more acidic than solution Z.

Solution Y is a neutral solution, such as distilled water.

Solution X is a weak acid because it turned thymolphthalein blue.

Solution Z is likely to have a pH of approximately 9.

Strong vs weak acids

Multiple Choice

There is a strong acid and a weak acid. Which diagram represents the strong acid?

Left diagram

Right diagram

Multiple Choice

Strong acids tend to have a _______ pH than weak acids as they have a _________ concentration of H⁺ ions.

higher, higher

higher, lower

lower, higher

lower, lower

Multiple Choice

A strong acid always has a lower pH than a weak acid.

True

False

Multiple Choice

Which diagram shows a dilute solution of a strong acid?

Multiple Choice

Which of the following acids (of equal concentration) has the highest electrical conductivity?

Hydrochloric acid

Sulfuric acid

Methanoic acid

Citric acid

What are some examples of acids you have learnt from lower secondary?

Type response here

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