Group 2, Metals

Question 1

What are they also known as?

Answer 1

Alkaline earth metals

Question 2

Experiment for magnesium and calcium with water:

Answer 2

1. Test tube half full of water, add the calcium (do NOT touch).
2. Hold an empty test-tube over the first test tube, to collect any gas produced.
3. After 1 min, test gas in top test tube with lighted splint. (Squeaky-pop test)
4. Add 5 drops of UI into lower test tube.
5. Repeat with magnesium, record results.

Question 3

What does the squeaky-pop experiment test for?

Answer 3

Hydrogen

Question 4

Calcium observations and results:

Answer 4

• had a big temperature change from cold 🥶 to hot 🥵
• effervescence
• testing gas produced: hydrogen makes a squeaky pop as the flame goes out
• alkali (PH12)

Question 5

Magnesium observations and results:

Answer 5

• a colourless solution and nothing happened
• (testing of gas produced): no hydrogen present
• neutral (PH7)