chapter 8 - acids & bases Flashcards
1
Q
what is an acid
A
substance that produces H+(aq) ions when dissolved in water
2
Q
what are the physical properties of acids ?
A
- tastes sour
- turns moist blue litmus paper red
- conductor of electricity
- ph below 7
3
Q
what are the chemical properties of acids ?
A
- acid + metal -> salt + hydrogen gas
- acid + bases -> salt + water
- acid + carbonate -> salt + water + carbon dioxide
4
Q
what is the test for hydrogen gas ?
A
extinguishes burning splint with “pop” sound
5
Q
what is the test for carbon dioxide ?
A
forms white precipitate in limewater
6
Q
what is a base ?
A
a substance that produces OH-(aq) when dissolved in water
7
Q
what are the physical properties of base ?
A
- tastes bitter
- soapy feeling
- turns red litmus paper blue
- ph above 7
8
Q
what are the chemical properties of base ?
A
- base + acid -> salt + water
- alkali + ammonium salt -> salt + water + ammonia
9
Q
what is oxide ?
A
substance that burns in air
