acids,bases and salts

Question 1

what is an acid?

Answer 1

a compound that releases H+ ions in an aqueous solution, it is described as a proton donor

Question 2

What is a base?

Answer 2

a proton acceptor

Question 3

What is an alkali?

Answer 3

a water-soluble base which releases OH- ions in an aqueous solution

Question 4

How does ammonia act as a base?

Answer 4

it accepts H+ ions from water to form the ammonium ion NH4+

Question 5

What is a neutralisation reaction?

Answer 5

negative ions are left uncharged in the aqueous solution, H+ ions reacts with the base

Question 6

What is a salt?

Answer 6

a compound formed when the H+ ion from an acid is replaced by a metal ion or ammonium ion

Question 7

What is the acid and metal oxide reaction?

Answer 7

acid + metal oxide —> salt + water

Question 8

What is the acid and alkali reaction?

Answer 8

acid + alkali —-> salt + water

Question 9

What is the acid and metal carbonate reaction?

Answer 9

acid + metal carbonate —> CO2 + salt + water
effervescence produced - CO2 produced

Question 10

What is the acid and ammonia reaction?

Answer 10

acid + ammonia —> ammonium salt

Question 11

What is the acid + metal reaction?

Answer 11

acid + metal —> salt + hydrogen
not an acid-base reaction
H+ gains an electron been reduced - redox reaction

Question 12

What is a strong acid?

Answer 12

an acid that iodises completely in aqueous solutions

Question 13

What is a weak acid?

Answer 13

an acid that is only partially ionised in aqueous solutions