Pregunta 1
Pregunta
The higher the concentration of hydrogen ions in an acidic solution, the lower the pH
Pregunta 2
Pregunta
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]
Pregunta 3
Pregunta
Complete the diagram to show the different colours indicators turn for these different solutions. Two have been completed for you.
Respuesta
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green
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orange
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red
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purple
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yellow
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colourless
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pink
Pregunta 4
Pregunta
A positive test for hydrogen gas would be to bubble it through limewater, and it turn cloudy/milky.
Pregunta 5
Pregunta
Which of the following salts are soluble?
Respuesta
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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
Pregunta 6
Pregunta
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
Respuesta
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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
Pregunta 7
Pregunta
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]
Respuesta
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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
Pregunta 8
Pregunta
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
Pregunta 9
Pregunta
When completing a titration, you need to work out a mean titre, and you must only include results that are concordant in your calculation.
Pregunta 10
Pregunta
most common sulfates (apart from lead sulfate, barium sulfate, calcium sulfate) are soluble
Pregunta 11
Pregunta
sulfuric acid + calcium [blank_start]carbonate[blank_end] → calcium [blank_start]sulfate[blank_end] + [blank_start]water[blank_end] + carbon dioxide
Pregunta 12
Pregunta
Label the diagram below
Respuesta
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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