Chapter 8 Group 2

Question 1

Solubilities from ca to barium of hydroxide

Explaining

Answer 1

Increases

Charge less density it becomes easier to free OH- ions

Question 2

Soluabilitey of BaCo3

Answer 2

Insolubles

Soluable at low ph

Question 3

Observation when group 2 nitrate thermal decomposition

Answer 3

Brown gas

4No2 + O2 always forms

Question 4

Uses of CACO3

Answer 4

Marble

Cement

Question 5

Flame test steps
Ca
St
Ba

Answer 5

Calcium ! Brick red
Stronium ! Scarlet red
Barium ! Apple green

Nichrome wire cleaned with Hcl then dipped in salt and heated in non luminous bunssen flame