Amount of Substance

Question 1

What do we call a molecule when there is a metal present?

Answer 1

A compound.

Question 2

What are the trends in positive and negative ions?

Answer 2

Positive ions don’t change their name. Negative single ions usually end in -ide, polyatomic usually end in -ate.

Question 3

What is the purpose of mass spectrometry?

Answer 3

Finds the relative atomic mass of an element or the relative formula mass of a compound. It can differentiate between isotopes.

Question 4

How do you find the Empirical formula?

Answer 4

Find the mass of each element, then find the moles of each element. Divide the moles by the smallest number and turn that into a whole number ratio. From there, you can find the formula.

Question 5

Iodide

Answer 5

I-

Question 6

Ammonium

Answer 6

NH4^+

Question 7

Hydroxide

Answer 7

-OH

Question 8

Fluoride

Answer 8

F-

Question 9

Carbonate

Answer 9

CO3^2-

Question 10

Nitrate

Answer 10

NO3^-

Question 11

Sulphate

Answer 11

SO4^2-

Question 12

Hydride

Answer 12

H-

Question 13

Aluminium

Answer 13

Al^3+

Question 14

Chloride

Answer 14

Cl-

Question 15

Hydrogen Carbonate

Answer 15

HCO3^-

Question 16

Calcium

Answer 16

Ca^2+

Question 17

Copper

Answer 17

Cu^2+

Question 18

Hydrogen

Answer 18

H^+

Question 19

Magnesium

Answer 19

Mg^2+

Question 20

Silver

Answer 20

Ag+

Question 21

Phosphate

Answer 21

PO4^3-