Chemical Equations

Question 1

Charge of silver (Ag)?

Answer 1

1+

Question 2

Charge of copper (I)?

Answer 2

1+

Question 3

Charge of zinc?

Answer 3

2+

Question 4

Charge of iron(II)?

Answer 4

2+

Question 5

Charge of copper (II)?

Answer 5

2+

Question 6

Charge of manganese (II)?

Answer 6

2+

Question 7

Charge of iron (III)?

Answer 7

3+

Question 8

Charge of chromium (III)?

Answer 8

3+

Question 9

Charge of ammonium?

Answer 9

1+

Question 10

Charge of hydroxide?

Answer 10

1-

Question 11

Charge of nitrate?

Answer 11

1-

Question 12

Charge of nitrite

Answer 12

1-

Question 13

Charge of sulfate?

Answer 13

2-

Question 14

Charge of carbonate?

Answer 14

2-

Question 15

Charge of phosphate?

Answer 15

3-

Question 16

Valency vs valence electrons

Answer 16

Valency refers to the number of electrons that the atom of the element gains or loses to achieve a fully filled valence shell/ noble gas configuration. It is written as its charge without the sign (+,-)

Valence electrons simply refer to electrons in the valence shell

Question 17

What group 1 metal ions are soluble/insoluble?

Answer 17

All are soluble

Question 18

Which ammonium compounds are soluble?

Answer 18

All are soluble

Question 19

Which nitrates are soluble/insoluble?

Answer 19

All are soluble

Question 20

Which halides are soluble/insoluble?

Answer 20

Insoluble: Silver and lead halides

(Ag/Pb halides)

Soluble: the rest

Question 21

Which sulfates are soluble/insoluble?

Answer 21

Insoluble: Calcium, barium and lead sulfates (CLB)

Soluble: the rest

Question 22

Which oxides, hydroxides and carbonates are soluble/insoluble?

Answer 22

Soluble: ammonium, group 1 and barium oxide and hydroxide

Insoluble: the rest