U1 T8 Acids, Bases, and Salts Flashcards
1
Q
What is an indicator?
A
A chemical that gives a colour change in acidic, alkaline, and neutral solutions.
2
Q
What colour are i) acids ii) neutral solutions and iii) alkaline solutions on a pH scale?
A
i) red
ii) green
iii) purple
3
Q
What colour is phenolphthalein in i) acid and ii) alkali
A
i) colourless
ii) pink
4
Q
What is the word equation for i) hydrochloric acid ii) sulfuric acid iii) nitric acid
A
i) HCl
ii) H2SO4
iii) HNO3
5
Q
Acid + metal = ?
A
Salt + hydrogen
6
Q
Acid + base* = ?
A
Salt + water
*metal oxide or metal hydroxide
7
Q
Acid + carbonate = ?
A
Salt + water + carbon dioxide
8
Q
True or false: on dissolving in water, acids give H+ ions
A
True
9
Q
True or false, alkalis give OH+ ions
A
False, it’s OH-
10
Q
What ionic equation does every reaction involving alkalis become?
A
H+(aq) + OH-(aq) = H2O(l)
