Compounds, formulae and equations

Question 1

Nitrate

Answer 1

NO3-

Question 2

Sulfate

Answer 2

SO4^2-

Question 3

Hydroxide

Answer 3

OH-

Question 4

Ammonium

Answer 4

NH4+

Question 5

Zinc

Answer 5

Zn2+

Question 6

Silver

Answer 6

Ag+

Question 7

Carbonate

Answer 7

CO3^2-

Question 8

Hydrogencarbonate

Answer 8

HCO3-

Question 9

Sulfur

Answer 9

S2-

Question 10

Lead

Answer 10

Pb4+

Question 11

Relative molecular/formula mass

Answer 11

weighted mean mass of a molecule/formula unit compared with 1/12th mass of carbon-12

Question 12

Mole

Answer 12

contains same amount of particles as 12g of C-12
(avogadro’s constant)

Question 13

Avogadro’s constant

Answer 13

6.02 x 10^23 mol^-1

Question 14

Mole formula

Answer 14

n = m/mr
n=vc

Question 15

Empirical formula

Answer 15

Simples whole number ratio of atoms of each element in a molecule

Question 16

Water of crytallisation

Answer 16

water present in hydrated salts

Question 17

Molar mass

Answer 17

mass per mol
g/mol

Question 18

Molecular formula

Answer 18

number and type of atoms of each element in a molecule

Question 19

Anhydrous compound

Answer 19

hydrated compound after its lost its water of crystallisation

Question 20

Gas volume in standard conditions

Answer 20

1 mol: 24dm^3

Question 21

cm^3 to dm^3 to m^3

Answer 21

divide by 1000
divide by 1000

Question 22

Ideal gas equation

Answer 22

PV = nRT

P- pascals
V- m^3
T- kelvin

Question 23

Dilution

Answer 23

concentration of original solution/ concentration of diluted solution

Question 24

Atom economy

Answer 24

Mr of desired product/ Mr of total products

Question 25

Percentage yield

Answer 25

amount in moles / theoretical amount in moles