acid and bases Flashcards
1
Q
properties of acids
A
- sour
- turn blue into red
- pH level less then 7
- react with carbons, metal and alkalis
- salt is always given out when mixed
2
Q
acid+ metal
A
- hydrogen+ salt
- a lighted splint is use to test for hydrogen
- “pop” sound
- lighted splint extinguishes
3
Q
conversion of acid
A
hydrochloric acid - chloride
sulfuric acid - sulfate
nitric acid - nitrate
4
Q
acid+ carbonate
A
- salt+ water+ CO2
-Limewater to test for CO2
5
Q
acids + alkalis
A
- salt + water
- neutralisation
6
Q
use of sulfuric acid and ethanoic acid
A
- detergents
- vinegar
7
Q
use of hydrochloric acid and citric acid
A
- removal of rust
- preservative
8
Q
pH scale
A
measures how acidic or alkaline a solution is in water
- acids = less then 7
9
Q
indicators
A
- chemical substance which change colors
10
Q
universal indicator
A
0-2 = red
3-4 = orange
5-6 = yellow ( weak acid)
7 - pale green
8-11 = green - blue
12-14 = purple violet
11
Q
phenolphthalein
A
- changes color at 9.7
- acid - colorless
- alkalis - pink
12
Q
methyl orange
A
- changes color at 3.7
- acids is red
-alkalis are yellow
13
Q
bromophenol blue
A
-changes color at 4
- acids become yellow
- alkalis become blue
