C12 Chemical Analysis

Question 1

1. What is a pure substance?

Answer 1

1. A single element or compound not mixed with any other substance

Question 2

2. How can you test that something is a pure substance?

Answer 2

2. It has a fixed boiling point (a mixture would boil over a range of temperatures)

Question 3

3. What is a formulation?

Answer 3

3. A mixture designed to have particular properties by carefully mixing exact quantities of different substances

Question 4

4. In chromatography how can you tell if something is pure?

Answer 4

4. It would only produce one spot

Question 5

5. What is the equation to calculate the Rf value?

Answer 5

5. Rf = distance moved by substance/ distance moved by solvent

Question 6

6. What is the test for hydrogen?

Answer 6

6. Lighted splint – squeaky pop

Question 7

7. What is the test for oxygen?

Answer 7

7. Glowing splint - relights

Question 8

8. What is the test for carbon dioxide?

Answer 8

8. Limewater – turns milky

Question 9

9. What is the test for chlorine?

Answer 9

9. Blue litmus – turns white