T4 - Chemical changes

Question 1

metal + oxygen =?

Answer 1

metal oxide

Question 2

What is oxidation in terms of oxygen?

Answer 2

gain of oxygen

Question 3

What is reduction in terms of oxygen?

Answer 3

loss of oxygen

Question 4

Metal + water =?

Answer 4

metal hydroxide + hydrogen

Question 5

Reactivity series? x10

Answer 5

-potassium
-sodium
-lithium
-calcium
-magnesium
-carbon
-zinc
-iron
-hydrogen
-copper

Question 6

What happens when a more reactive metal reacts with a less reactive metal from a compound?

Answer 6

displaces it

Question 7

What are unreactive metals found as?

Answer 7

The metal itself

Question 8

What are most metals found as?

Answer 8

compounds

Question 9

What is oxidation in terms of electrons?

Answer 9

loss of electrons

Question 10

What is reduction in terms of electrons

Answer 10

gain of electrons

Question 11

In an aqueous solution, what do acids produce?

Answer 11

hydrogen ions

Question 12

In an aqueous solution, what do alkalis produce?

Answer 12

hydroxide ions

Question 13

acid + alkali=?

Answer 13

salt + water

Question 14

acid + metal=?

Answer 14

salt + hydrogen

Question 15

What do all acids contain?

Answer 15

hydrogen

Question 16

Equation for number of moles for titration?

Answer 16

number of moles = concentration (mol/dm^3) x volume(dm^3)