click below
click below
Normal Size Small Size show me how
Form 3 Chemistry
Question | Answer |
---|---|
Name 3 common acids | battery acid, milk, vinegar, coffee gastric juices, urine |
Name 3 common bases | lime, ammonia, sodium hydroxide, sea water, bleach, baking soda |
Write down the single replacement reaction formula | AB + C = CB + A |
Write down the double replacement reaction formula | AB + CD = AD + CB |
Write down the synthesis/composition reaction formula | A + B = AB |
Write down the decomposition reaction formula | AB = A + B |
Characteristics of an acid | - sour - corrosive - low pH |
Characteristics of a base | - bitter - soapy/slippery tactile - high pH |
The role of an indicator? | To detect the amount of pH or to recognise an acid or alkaline solution |
What is the product of a precipitation reaction? | Insoluble ionic solid called a precipitate |
What do combustion reactions require? | An oxidiser (fuel) and a flammable/combustible material |
What is the product of a neutralisation reaction? | Salt and Water (Na + H2O) |
Definition of "exothermic" | Releases heat |
Definition of "endothermic" | Absorbs heat |
What is the range of the pH scale? | 1 - 14 |
What pH does water have? | 7 (neutral) |
What reaction occurs when an acid and a base is combined? | Neutralisation |
What reaction occurs when cations and anions are combined? | Precipitation |