AQA Chemistry C3 Quiz - Flashcards in GCSE Chemistry

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Created by: Josh
Created on: 08-05-11 09:32

1. [Water and Solubility] Why does a refridgerated fizzy drink that was in a bottle effervesce when it is poured into a glass?

Because the air outside the bottle is at a lower pressure than the inside of the bottle; this decrease in pressure means that less carbon dioxide can be dissolved in the drink, so some bubbles out.
All of the above
Because the drink is warming up, and so less carbon dioxide can be dissolved in it; this causes some to bubble out.
None of the above

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Other questions in this quiz

2. [Water and Solubility] Which two ions present in 'hard water' cause its 'hardness'?

Ca 2+ and Fe 2+
Mg 2+ and K +
Al 3+ and Ca 2+
Ca 2+ and Mg 2+
Fe 2+ and Fe 3+

3. [Water and Solubility] A domestic water softener usually contains ions of which element?

Al
Hg
Cl
Na
Br

4. [Water and Solubility] Why is thermal pollution dangerous to aquatic fauna?

Because the heat reduces the amount of oxygen that can be dissolved in the water - this means the aquatic creatures can get less oxygen.
Because the heat increases the amount of dissolved oxygen in the water - this causes the fish to get oxygen poisoning.
Because the heat scares the fish.

5. [Water and Solubility] The solubility of solid X at 50°C is 10g/100g water. At 20°C, the solubility is 2g/100g water. I cool a 50°C saturated solution of X down to 35°C; 4.3g crystallises out of solution. How much more will crystallise out of the

3.6g
3.75g
3.55g
3.7g
3.65g

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Comments

Report Sun 15th May, 2011 @ 19:53

Very very good :) 5/5

Report Sat 21st May, 2011 @ 08:19

Thanks :)

Report Tue 24th May, 2011 @ 16:18

v helpful

Report Tue 24th May, 2011 @ 16:18

v helpful

Report Tue 24th May, 2011 @ 16:18

v helpful

Report Tue 24th May, 2011 @ 16:19

v helpful

Report Sat 21st April, 2012 @ 12:48

6 wrong!

Report Mon 26th December, 2016 @ 15:19

v helpful

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