Toddy Kwest chemistry extra

Question 1

rf value

Answer 1

can be used to see what substance it is based on previously recorded rf values.
The Rf value for a particular substance is always the same if the same solvent and stationary phase are used.

distance travelled by substance/distance travelled by solute

Question 2

saturated

Answer 2

solution with maximum amount of solute in solvent

Question 3

What salts are soluble in water

Answer 3

Potassium, sodium and ammonium salts

Question 4

What type of “-ate” compound is always soluble in water

Answer 4

all nitrates

Question 5

All common halides (chlorides, bromides, iodides) are soluble in water except these 2

Answer 5

Silver halides and lead halides

Question 6

All common carbonates are insoluble in water except these 3

Answer 6

Sodium, Potassium and Ammonium

Question 7

All common hydroxides are insoluble in water except these 3

Answer 7

Sodium, Potassium and Ammonium carbonates?