6-Acids,Bases+Salts

Question 0

How do you make salts from metal?

Answer 0

Metal+Acid—>Salt+Hydrogen

Question 1

What are the 4 state symbols?

Answer 1

(s) -Solid
(l) -Liquid
(aq) -Aqueous
(g) -Gas

Question 2

What are bases?

Answer 2

Oxides and hydroxides of metals, soluble ones are alkalis.

Question 3

How do you make a soluble salt from an insoluble base?

Answer 3

Acid+Base—>Salt+Water

Question 4

How do you make a salt from a soluble base?

Answer 4

Acid+Alkali—>Salt+Water

Question 5

How do you solidify a salt from a salt solution?

Answer 5

By evaporating the water.

Question 6

What ions make solutions acidic?

Answer 6

H+ ions.

Question 7

What ions make solutions alkali?

Answer 7

OH- ions.

Question 8

What can you use to remove unwanted ions from a solution?

Answer 8

Precipitation.

Question 9

What is neutralisation?

Answer 9

When acids and alkalis cancel each other out. The H+ and OH- ions react to form water.

Question 10

What is the equation for neutralisation?

Answer 10

H+ + OH- —> H2O

Question 11

How is ammonia used?

Answer 11

Turned into ammonium nitrate by neutralising nitric acid and is used in fertilisers. It increases amount of hydrogen in the soil.

Question 12

What is the equation for neutralising ammonia and nitric acid?

Answer 12

NH3 + HNO3 —> NH4NO3

Question 13

What are the pros and cons of ammonium nitrate?

Answer 13

Pros:
*Increases crop yield
*Increases crop size
Cons:
*Can contaminate drinking water
*Can encourage algae growth in reservoirs/lakes which bacteria break down and use up all oxygen so becomes lifeless (eutrophication)
*To much nitrate in water can cause health problems