Particles And Moles

Question 0

Find concentration of solution

Answer 0

Evaporate so solute is left, measure mass before and after

Question 1

Solution made of

Answer 1

Solute and solvent

Question 2

Avogadro’s number

Answer 2

Mass of element equal to relative atomic mass in grams always contains 6.02 x10^23 atoms

Question 3

Calculate moles in element

Answer 3

Mass in grams / relative atomic mass

Question 4

Calculate moles of a compound

Answer 4

Mass in grams / relative formula mass

Question 5

Use of copper sulfate solution

Answer 5

Remove algae from water

Question 6

Soluble salt

Answer 6

Copper sulfate

Question 7

Acid+base—->

Answer 7

Salt+water

Question 8

Copper oxide + sulfuric acid——>(little at a time)

Answer 8

Copper sulfate(blue solution) + water

Question 9

As water leaves copper sulfate

Answer 9

Crystallises

Question 10

Acid dissolved in water

Answer 10

Hydrogen^+ions

Question 11

Soluble base dissolved in water

Answer 11

Hydroxide ions OH^-

Question 12

Why does water form from neutralisation

Answer 12

Hydroxide ions come from the base
Hydrogen ions come from the acid
They attract and form water

Question 13

Concentration of solution

Answer 13

Moles of solute / volume of solution