Experimental technique

4 ROUNDS

PICK TIME!!

1. TAKING MEASUREMENTS IN LAB

15 MIN

2. PURE & IMPURE SUBSTANCE

15 MIN

3. WAYS TO PURIFY A SUBSTANCE

30 MIN

4. PAPER CHROMATOGRAPGHY

30 MIN

What would you use in the lab, to measure out a very accurately 25.0 cm³ of solutions

Round 1

Give this in grams:

• 2.5 kg

• 0.5 kg

Give this in cm^3:

• 0.5 L

• 2 dm³

Give this in dm³ :

• 2 L

• 0.5 L

• 1500 cm³

• 500 cm³

VOLUME OF LIQUID

• 1 cm³ = 1 mL

• 1 dm³ = 1 L

• 1000 cm³ = 1 dm³ = 1L

How can you tell if a sample is pure? Please justify with 3 facts.

Round 2

How can you tell if a sample is impure? Please justify with 3 facts.

Round 2

It is very important that a substance are pure? Give two examples

Round 2

DEMONSTRATE WHAT IS HAPPENING ON THE CHROMATOGRAPH PAPER.

Round 4

Explain their separation process

Round 4