Quantitative Chemistry

Question 1

Explain what is meant by molecular formula

Answer 1

formula which shows the actual number of atoms of each element in a molecule

Example : C2H6

Question 2

Explain what is meant is meant by Empirical Formula

Answer 2

a formula which shows the simplest whole number ratio of atoms of each element in a compound

CH3

Question 3

Formula of Moles

Answer 3

Mass/RFM

Question 4

Define the term Hydrated

Answer 4

Hydrated means that solid crystals contain water of crystallization

Question 5

Define the term Anhydrous

Answer 5

Does not contain water of crystallization

Question 6

Define Dehydration

Answer 6

means removal of water of crystallization

Question 7

Define Water of Crystallisation

Answer 7

Water which is chemically bone into the crystal structure

Question 8

Describe Heating to Constant mass

Answer 8

finding the mass of a suitable container and the counting containing the initial substance, heating the substance in the container and taking mss measurements and various intervals during the heating until two consecutive mass measurements are the same

Question 9

How to remove water of crystallisation

Answer 9

by heating to constant mass

Question 10

Formula to find concentration

Answer 10

solution volume

Question 11

Formula to find Solution

Answer 11

concentration

Question 12

formula to find moles

Answer 12

1000

Question 13

Formula for atom economy

Answer 13

total mass of products