Revision: C5-Chemical Changes

Which of the following pH numbers indicates a neutral substance?

• 1
• 5
• 7
• 14

Which of the following pH numbers indicates a strong acid?

• 1
• 5
• 7
• 14

Which of the following pH numbers indicate a strong alkali?

• 1
• 5
• 7
• 14

What colour does pH paper turn when added to an alkali?

• Blue/Purple
• Red/orange
• Green
• Colourless

What substance could you use to test if a substance is an acid or alkali?

• Indicator
• Salt
• Catalyst
• Water

Which of the following substances is the strongest acid?

• soda, pH 3
• tomatoes, pH 4.5
•  stomach acid, pH 2
• coffee, pH 5

Tags

NGSS.MS-PS1-2

What salt is produced if you react sodium hydroxide with hydrochloric acid?

• sodium hydroxide
• sodium sulfate
• sodium nitrate
• sodium chloride

A salt is formed when nitric acid combines with sodium hydroxide. What is the name of the salt?

• Sodium chloride
• Sodium nitrate
• Hydrogen Nitrate
• Nirate

Why must chemical equations be balanced?

• So that the equation doesn't explode
• The reaction won't happen until it is balanced
• Matter cannot be created or destroyed
• None of these

• PH scale

• pH ruler

• pH scale

• pH statistical tables

Tags

NGSS.MS-PS1-2