pH 7

What does pH measure?

• the amount of hydrogen (H⁺) ions

• the amount of hydroxide (OH^-) ions

• amount of water

• all of the above

Which of the following is the strongest acid?

• 1

• 5

• 3

• 8

Which of the following is the strongest base?

• 4

• 14

• 7

• 15

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

A(n) _______ is a substance with a pH greater than 7.

• Base
• Acid
• Buffer
• Water

base + acid --> ..... + water

• salt

• bacid

• hmm

• reactive

What type of reaction is the following: 
HCl  + Zn --> ZnCl₂ + H₂

• Neutralisation
• Acid and a metal 
• Acid and a carbonate 
• Ionic 

is blood an acid?

• Yes

• No

• l don’t know

What is lemon ph?

• 2

• 4

• 3

• 19