Chemical Reactions and equations

Question 1

What is a chemical reaction?

Answer 1

A chemical reaction is a process which substances are converted into different substances by forming and breaking of chemical bonds.

Question 2

What is a chemical Equation?

Answer 2

A symbolic representation of a chemical reaction .

Question 3

What is an acid?

Answer 3

A substance that releases hydrogen ions when dissolved in water.

Question 4

What is a base?

Answer 4

A substance that releases hydroxide ions when dissolved in water.

Question 5

Give examples of acids

Answer 5

Hydrochloric acid- HCL
Sulphuric Acid- H2SO4
Nitric Acid- HNO3

Question 6

Give examples of bases

Answer 6

Sodium Hydroxide- NaOH
Calcium Hydroxide- Ca(OH)2
Magnesium oxide- MgO
Ammonia- NH3

Question 6

Examples of acids in everyday life

Answer 6

lemons, Vinegar, Citrus fruits, sodas

Question 7

Examples of bases in everday life

Answer 7

Soap
Baking Soda

Question 8

What are some physical properties of acids

Answer 8

Sour taste
Corrosive to metals
turn blue litmus paper red
dont feel slippery
ph is less than 7

Question 9

Physical properties of a base

Answer 9

Bitter taste
slippery or soapy feel
turn red litmus paper blue
Do not taste sour
ph greater than 7

Question 10

What are indicators? Give examples

Answer 10

Indicators are substances that change color in the presence of acids or bases.
Examples include litmus paper, bromothymol blue and ,methyl orange.

Question 11

What does ph mean?

Answer 11

Potential of hydrogen