Topic 3 Chemical Changes

Question 1

What ions do acids form In water?
What pH do acids have?

What ions do alkalis form in water?
What pH do acids have?

Answer 1

Form H+ ions in water
Acids have pH of less than 7

Alkalis:
Have pH above 7
Form OH- ions in water

Question 2

What is the ionic equation of neutralization?

Answer 2

H+ + OH- —>H2O

Aq. Aq. L

Question 3

What do strong acid and weak acids do in water?

Answer 3

Strong acids ionize completely

Weak acids do not fully ionize in solution

Question 4

Rules of solubility?

Answer 4

Common salts of sodium,potassium and ammonium-soluble
Nitrates-soluble
Common chlorides(except from sodium and lead chloride)-soluble
Common sulfates(except lead,barium and calcium sulfate)-soluble
Common carbonates and hydroxides(except for sodium,potassium and ammonium)-insoluble

Question 5

What is the reactants of Acid+Metal Oxide

Answer 5

—>salt+water

Question 6

Acid + metal hydroxide—>

Answer 6

Salt+water

Question 7

Acid +Metal

Answer 7

—>salt+water

Question 8

Acid+metal carbonate—>

Answer 8

Salt+water+carbon dioxide

Question 9

What is the test for hydrogen?

Answer 9

Using a lighted splint and put it near your gas and hydrogen gas will make a squeaky pop sound

Question 10

How do you test for oxygen

Answer 10

Put lighted splint in your gas if oxygen present splint relight

Question 11

How do you test for CO2?

Answer 11

By bubbling your gas through limewater and limewater will turn cloudy if carbon dioxide present