Metal Oxides And Hudroxides

Question 1

What is an acid

Answer 1

They produce H+ ions in a solution

Question 2

What is a base

Answer 2

It accepts protons I’m a solution

Question 3

What are examples of bases

Answer 3

Metal oxides and hydroxides

Question 4

What is an example of an acid

Answer 4

HCL

Question 5

Equation for a reaction between metal oxide and acid

Answer 5

CaO + 2HCL > CaCl2 + H2O

Question 6

Equation for reaction metal hydroxide and acid

Answer 6

NaOH + HCL > NaCL + H2O

Question 7

Uses of metal hydroxides and metal oxides

Answer 7

They can be used to neutralise acids for example increasing soil ph and neutralising stomach acid

Question 8

What is an amphoteric oxide

Answer 8

Can be used as either an acid or base

Question 9

What is an example of an amphoteric oxide

Answer 9

Aluminium oxide

Question 10

How do you extract alumina from bauxite

Answer 10

1-crush bauxite 
2- react with NaOH to for NaAl(OH)2
3-filter out solid impurities 
4- allow to crystallise forming Al(OH)3
5- heat on rotating kiln to form Al2O3

Question 11

Wrote the ionic equation for reaction between metal hydroxide and metal oxide with acid

Answer 11

O2+ + 2H+ > H2O

OH- + H+ > H2O

Question 12

Write the equation of an amphoteric oxide used as an acid and base

Answer 12

Al2O3 + 2NaOH + 3H2O > 2NaAl(OH)2

Al2O3 + 6HCL > 2AlCl3 + 3H2O