Top answers

What factors affect the equilibrium position and in what way?

The easiest way to think about this is as the 'law of opposites' Temperature Exothermim reactions: If temp is increased then the reaction moves in the direction to reduce this rise of temp by shifting equili...
NL
Answered by Nathan L. • Chemistry tutor
7114 Views

Describe the trend in the reactivity of group 2 elements with chlorine as you descend down the group.

As you progress down the group:- Atomic radius increases, therefore there is more electron shielding.- There is an increase in the nuclear charge, however it is outweighed by the increase in shielding.- It i...
NL
Answered by Nathan L. • Chemistry tutor
15309 Views

Name a test for a C=C double bond

Bromine water:- Turns colourless when mixed with a double bond (unsaturated)- Remains Orange-Brown when mixed with a C-C single bond (saturated)
NL
Answered by Nathan L. • Chemistry tutor
8305 Views

What is an emulsion? and give some examples

Emulsions are solutions of water and oil. With small droplets of one suspended in the other. Common examples of emulsions: - Mayonnaise, Milk (oil droplets in water)- Butter, Margarine (water droplets in oil)
NL
Answered by Nathan L. • Chemistry tutor
19999 Views

How do you make calcium hydroxide (Ca(OH)2) from Calcium carbonate (CaCO3) and what are the equations.

Thermally decompose the calcium carbonate:CaCO 3 -> CaO + CO 2 Now mix the CaO with water:CaO + H 2 O -> Ca(OH) 2
NL
Answered by Nathan L. • Chemistry tutor
23807 Views