5.1 Acids and Bases

Multiple Choice

Which characteristics describe an acid?

• tastes sour, litmus indicator turns red

• tastes bitter, litmus indicator turns blue

• tastes sweet and sour, litmus indicator turns red

• tastes sour and bitter, litmus indicator turns blue

Multiple Choice

Which of the following is an acid?

• soap

• baking soda

• orange juice

• water

Multiple Choice

What is present in aqueous solutions of an acid or alkali that allow them to conduct electricity?

• mobile electrons

• mobile ions

• mobile atoms

• mobile molecules

Multiple Choice

Which statement is true?

• the lower the pH, the stronger the acid

• the higher the pH, the stronger the acid

• the lower the pH, the more neutral the acid

• the higher the pH, the weaker the alkali

Multiple Choice

A very strong acid would have a pH of

• 1

• 7

• 9

• 14

Multiple Choice

A solution with a pH of 3.6 would be

• acidic

• alkaline

• neutral

• acidic and alkaline

Multiple Choice

Which of the following best describes hydrochloric acid?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes nitric acid?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes sulfuric acid?

• acid

• base

• alkali

Multiple Choice

What type of salt can hydrochloric acid produce?

• calcium hydrochloric

• calcium hydrochloride

• calcium chloride

• calcium nitrate

Multiple Select

Which of the following produce magnesium chloride salt?

• magnesium and hydrochloric acid

• magnesium oxide and hydrochloric acid

• magnesium hydroxide and hydrochloric acid

• magnesium carbonate and hydrochloric acid

Multiple Choice

Which of the following is the ionic equation for neutralisation?

• $$H^{+^{ }}+OH^-\rightarrow H_2O$$  

• $$H_2+O_{2_{ }}\rightarrow H_2O_2$$  

• $$2H^++OH^-\rightarrow H_3O$$  

• $$NaOH\ +HCl\ \rightarrow NaCl\ +H_2O$$  

Multiple Choice

Which characteristics describe a base?

• tastes sour, litmus indicator turns blue

• tastes bitter, litmus indicator turns blue

• tastes bitter sour, litmus indicator turns blue green

• tastes bitter sour, litmus indicator turns green

Multiple Choice

Which of the following is a base?

• carbonated water

• lime juice

• vinegar

• dishwashing detergent

Multiple Choice

What property do all three of these household items have in common?

• sometimes conduct electricity

• taste soapy

• have a pH equal to or above 7

• turn litmus paper blue

Multiple Choice

When Sally tested an unknown solution, her red litmus paper turned blue, but her blue litmus paper remained blue. What does this indicate?

• unknown is acidic

• unknown is alkaline

• unknown is neutral

• unknown can be acidic, alkaline or neutral

Multiple Choice

A weak alkali would have a pH of

• 8

• 7

• 6

• 14

Multiple Choice

A solution with a pH of 8.6 would be

• acidic

• alkaline

• neutral

• acidic and alkaline

Explanation Slide...

Basic solutions conduct electricity and turn litmus paper blue.

Multiple Choice

A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper blue. What can the student infer?

• The solution contains an acid.

• The solution contains a base.

• The solutions is neutral.

Multiple Choice

... are used to neutralise acid in the stomach.

• Toothpastes

• Bacterias

• Antacids

• More strong acids

Multiple Choice

Why is toothpaste alkaline?

• It can neutralise strong alkaline in

  your mouth

• It can neutralise acid in

  your mouth

• It can refresh your teeth

• Toothpaste is not alkaline.

Multiple Choice

products of a neutralisation reaction are always

• an acid and a base
• an acid and a salt
• salt and water
• salt and base

Multiple Choice

Which of the following best describes potassium hydroxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes potassium oxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes calcium hydroxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes iron(II) hydroxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes copper(II) hydroxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes aluminium hydroxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes magnesium oxide?

• acid

• base

• alkali

Multiple Choice

Which of the following best describes magnesium hydroxide?

• acid

• base

• alkali

Multiple Choice

Base/alkali + ammonium salt --> ? 

• salt + water + ammonia gas
• salt + ammonia gas 
• salt + water + hydrogen gas
• salt + water 

Open Ended

Ammonium fertilisers are never added at the same time as slaked lime or quick lime.

Explain why is this so.

Multiple Choice

Ammonium salts reacts with alkali to form a pungent gas.

Name this gas.

• carbon dioxide

• hydrogen

• oxygen

• ammonia

Multiple Choice

How do you test for the presence of ammonia gas?

• gas forms white precipitate in limewater

• gas extinguishes lighted splint with a 'pop' sound

• gas turns moist red litmus paper blue

• gas turns moist blue litmus paper red

Multiple Choice

Which of the following are NOT uses of bases?

• Used in car batteries

• Used in farming to reduce acidity in the soil

• Used to make fertilisers

• Used to make household cleaners

Multiple Select

Select the statements that are true of basic oxides.

• They are oxides of metals.

• They dissolve in water to form acids.

• They react with acids to form salt and water.

• They react with bases to form salts and water.

Match

Types of oxides

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

non metal oxide

metal oxide

LAZ oxide

NO CO H2O

• non metal oxide

• metal oxide

• LAZ oxide

• NO CO H2O

Match

Types of oxides

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

reacts with alkali

reacts with acid

reacts with both acid and alkali

does not react with acid or alkali

• reacts with alkali

• reacts with acid

• reacts with both acid and alkali

• does not react with acid or alkali

Match

Types of oxides

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

carbon dioxide

lithium oxide

lead(II) oxide

carbon monoxide

• carbon dioxide

• lithium oxide

• lead(II) oxide

• carbon monoxide

Match

Types of oxides

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

sulfur dioxide

copper oxide

zinc oxide

nitrogen monoxide

• sulfur dioxide

• copper oxide

• zinc oxide

• nitrogen monoxide

Multiple Choice

lithium oxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

sodium oxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

iron oxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

carbon dioxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

sulfur dioxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

lead(II) oxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

aluminium oxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

zinc oxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

carbon monoxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

water

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide

Multiple Choice

nitrogen monoxide

• acidic oxide

• basic oxide

• amphoteric oxide

• neutral oxide