PHS: Edexcel C8 Acids and Alkalis - Review

What does this hazard symbol mean?

• corrosive
• flammable
• harmful
• irritant

What colour does litmus turn in acidic solutions?

• blue

• yellow

• pink

• colourless

• red

What colour does methyl orange turn in alkaline solutions?

• blue

• yellow

• pink

• colourless

• red

What colour is phenolphthalein in acidic solutions?

• blue

• yellow

• pink

• colourless

• red

What colour is litmus in alkaline solutions?

• blue
• yellow
• pink
• colourless
• red

What colour is methyl orange in acidic solutions?

• blue

• yellow

• pink

• colourless

• red

What colour is phenolphthalein in alkaline solutions?

• blue

• yellow

• pink

• colourless

• red

Acids have a pH of less than which number?

What is the formula for hydrochloric acid?

• Hcl

• HCL

• HCl

• hcl

What is the formula for sodium hydroxide?

• NaOH
• NAOH
• naoh
• Naoh