Questão 1
Questão
The higher the concentration of hydrogen ions in an acidic solution, the lower the pH
Questão 2
Questão
As hydrogen ion concentration in a solution increases by a factor of 10, the pH of the solution decreases by [blank_start]1[blank_end]
Questão 3
Questão
Complete the diagram to show the different colours indicators turn for these different solutions. Two have been completed for you.
Responda
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green
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orange
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red
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purple
-
yellow
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colourless
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pink
Questão 4
Questão
A positive test for hydrogen gas would be to bubble it through limewater, and it turn cloudy/milky.
Questão 5
Questão
Which of the following salts are soluble?
Responda
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sodium chloride
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sodium nitrate
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silver chloride
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barium sulfate
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barium chloride
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sodium carbonate
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copper carbonate
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calcium hydroxide
Questão 6
Questão
electrolysis of copper chloride solution will form:
[blank_start]copper[blank_end] at the cathode
[blank_start]chlorine[blank_end] at the anode
electrolysis of sodium chloride solution will form:
[blank_start]sodium[blank_end] at the cathode
[blank_start]chlorine[blank_end] at the anode
electrolysis of sodium sulfate solution will form:
[blank_start]sodium[blank_end] at the cathode
[blank_start]oxygen[blank_end] at the anode
electrolysis of water acidified with sulfuric acid will form:
[blank_start]hydrogen[blank_end] at the cathode
[blank_start]oxygen[blank_end] at the anode
electrolysis of lead bromide will form:
[blank_start]lead[blank_end] at the cathode
[blank_start]bromine[blank_end] at the anode
Responda
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copper
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hydrogen
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chlorine
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oxygen
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sodium
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hydrogen
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chlorine
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oxygen
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sodium
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hydrogen
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oxygen
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sulfur
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hydrogen
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oxygen
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sulfur
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oxygen
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hydrogen
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sulfur
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lead
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hydrogen
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bromine
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oxygen
Questão 7
Questão
sodium + [blank_start]hydrochloric[blank_end] acid → [blank_start]sodium[blank_end] chloride + water
[blank_start]copper[blank_end] oxide + sulfuric acid → copper [blank_start]sulfate[blank_end] + water
[blank_start]potassium[blank_end] hydroxide+ [blank_start]nitric[blank_end] acid → potassium nitrate + water
[blank_start]magnesium[blank_end] carbonate + hydrochloric acid → magnesium [blank_start]chloride[blank_end] + water + [blank_start]carbon dioxide[blank_end]
Responda
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hydrochloric
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sodium
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copper
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sulfate
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potassium
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nitric
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carbon dioxide
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magnesium
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chloride
Questão 8
Questão
When making a soluble salt from an acid and insoluble reactants:
excess of the reactant (a metal, metal oxide, or metal carbonate) is added to make sure all of the insoluble reactant reacts
Questão 9
Questão
When completing a titration, you need to work out a mean titre, and you must only include results that are concordant in your calculation.
Questão 10
Questão
most common sulfates (apart from lead sulfate, barium sulfate, calcium sulfate) are soluble
Questão 11
Questão
sulfuric acid + calcium [blank_start]carbonate[blank_end] → calcium [blank_start]sulfate[blank_end] + [blank_start]water[blank_end] + carbon dioxide
Questão 12
Questão
Label the diagram below
Responda
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DC current
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AC current
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electrolyte
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cation
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cathode
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anion
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anode