Chapter 8
Subdecks (1)
Cards (137)
- Reducing agent
- Redox reaction. Group 2 metal is oxidised
- An alkaline hydroxide is formed
- Increases, so reactions become more vigorous
- Atomic radius and shielding effect increase, so nuclear attraction decreases
- Form a salt and hydrogen
- Indigestion remedies to neutralise excess hydrochloric or stomach acid
- Neutralise acidic soil
- Increases down the group so the solutions become more alkaline
- Group 7 molecules or atoms
- Negative ions formed by group 7
- Oxidising
- Non-polar solvents dissolve non-polar molecules
- More electrons form stronger IDD forces in-between molecules
- Atomic radius and shielding increases, so weaker nuclear attraction to capture an electron from another species.
- Decreases
- Precipitate dissolves in dilute ammonia
- White
- Precipitate dissolves in concentrated ammonia
- Precipitate is insoluble in concentrated ammonia
- Cream
- Yellow
- Chlorine is added to drinking water to kill bacteria
- Chlorine is both oxidised and reduced
- Reacting cold dilute sodium hydroxide with chlorine
- The oxidation and reduction of the same element in a redox reaction
- To purify water
- Pale green
- Orange
- Violet
- The trend in properties of elements across a group
- Pale green
- Brown
- Pale green (g)
- Orange (l)
- Grey (s)