1.Acids, bases and salts.

Question 1

What is a salt?

Answer 1

salts are ionic compounds formed when the H+ ions in acids are replaced by metal IONS or ammonia ions.

Question 2

What is a base

Answer 2

a proton acceptor

Question 3

What is an acid

Answer 3

a proton donor (releases H= ions in aqueous solution)

Question 4

what is a alkali

Answer 4

Releases OH- ions when in a water solution

Question 5

whys are things classified as a base but not as an alkali?

Answer 5

IF it accepts protons but dosnt dissolve it cant be and alkali because an alkali need to be able to release OH- ions into a solution which cant happen if its insoluble.

Question 6

Acid + metal oxide —->

Answer 6

Salt + water

Question 7

Acid + metal (reactive) —->

Answer 7

salt + hydrogen gas

Question 8

Acid + metal carbonate—->

Answer 8

salt + CO2 + water

Question 9

Acid + metal hydro carbonate —->

Answer 9

salt + water + CO2

Question 10

Acid + alkali —->

Answer 10

salt + water

Question 11

3 types of bases

Answer 11

Metal hydroxides - HO- ion reacts with H+ to from water
Metal Oxides-
Ammonia (and organic amino componds)

Question 12

dilute amodia decolourises which halid ions?

Answer 12

Chloride

Question 13

conc ammonia decoulourises which halide ions?

Answer 13

Bromide, and Chloride

Question 14

insoluble compoud + acid is slow becuase ….

Answer 14

only the surface of the compound can react at once.

Question 15

methyl orange colours

Answer 15

Alkaline-yellow
neural(bit more acidic 4ph) -orange
acidic - red

Question 16

Phenolphthalein colours

Answer 16

acid - colorless

alkali-pink