2.1.2 compounds, formulae and equations

Question 1

what is a binary compound?

Answer 1

contains only two elements

Question 2

what is the ionic charge of silver ions?

Answer 2

1+

Question 3

what is the ionic charge of zinc ions?

Answer 3

2+

Question 4

what is the ionic charge of iron ions?

Answer 4

iron (II) - 2+

Iron (III) - 3+

Question 5

what is the ionic charge of copper ions?

Answer 5

copper (I) - 1+

copper (II) - 2+

Question 6

what are polyatomic ions?

Answer 6

an ion that contains atoms of more than one element bonded together

Question 7

what is the ionic charge and formula of nitrite [nitrate (III)] ions?

Answer 7

NO₂ ⁻

1 -

Question 8

what is the ionic charge and formula of hydrogencarbonate ions?

Answer 8

HCO₃ ⁻

1 -

Question 9

what is the ionic charge and formula of manganate (VII) (permanganate) ions?

Answer 9

MnO₄ ⁻

1 -

Question 10

what is the ionic charge and formula of sulfite [sulfate (IV)] ions?

Answer 10

SO₃ ²⁻

2 -

Question 11

what is the ionic charge and formula of dichromate (VI) ions?

Answer 11

Cr₂O₇²⁻

2 -

Question 12

what is the ionic charge and formula of phosphate ions?

Answer 12

PO₄ ³⁻