Chapter 1 Experimental chemistry

Question 1

What is mass and its precision, apparatus and si unit

Answer 1

how much matter in a substance
kg
electronic balance
0.00

Question 2

What is time and its precision, apparatus and si unit

Answer 2

how long it takes for something to occur
s
stopwatch
0.00

Question 3

What is precision of temperature

Answer 3

0.0

Question 4

Precision of a pippete ?

Answer 4

25.0

Question 5

Precision of a burrete

Answer 5

0.05

Question 6

Precision of measuring cylinder

Answer 6

0.5

Question 7

precision of volumeatirc glass

Answer 7

100cm

Question 8

How do you measure gas

Answer 8

Gas syringe

Question 9

How are gases collected

Answer 9

displacement of water
downward delivery
upward elivery

Question 10

how displacement of water works

Answer 10

insoluble to slightly soluble
density does not affect
co2
o
hydrogen

Question 11

how downward delivery works

Answer 11

soluble to slightly soluble
denser than air

chlorine

hydrogen chloride
sulfur dioxide

Question 12

how upward delivery works

Answer 12

soluble or insoluble

less dense than air
ammonia

Question 13

Method of drying gases

Answer 13

concentrated sulfuric acid - dry acidic gases, acid exiting is the smaller tube
quicklime - dry ammonia
fused calcium chloride - any gas except ammonia

Question 14

ways of separating solid solid

Answer 14

magnetic attraction - separate magnetic from non mag
sieving - solids of diff particle size
suitable solvent - seaprate in a mixture where one is soluble in solvent
sublimation - solid to gas

Question 15

ways of sep solid and liquid

Answer 15

filtration
evap to dryness
crystallisation
simple distill

Question 16

how to sep liq-liq

Answer 16

separating funnel
chromatography
fractional distillation