In a cation precipitation reaction test, we added sodium hydroxide to Aluminium (3+) , what was the colour of the precipitate formed?
Antworten
blue
green
white
brown
Frage 4
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In a cation precipitation reaction test, we added sodium hydroxide to iron (3+), what was the color of the precipitate formed?
Antworten
brown
white
blue
green
Frage 5
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When testing for halide ions we added a small amount of the solution to a test tube, added a few drops of dilute nitric acid and silver nitrate. The test tube with Cl- ions in it would be which colour?
Antworten
white
cream
yellow
Frage 6
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Wen testing for halide ions we added a small amount of the solution to a test tube, added a few drops of dilute nitric acid and silver nitrate. The test tube with Br- ions in it would be which colour?
Antworten
white
cream
yellow
Frage 7
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Wen testing for halide ions we added a small amount of the solution to a test tube, added a few drops of dilute nitric acid and silver nitrate. The test tube with I- ions in it would be which colour?
Antworten
white
cream
yellow
Frage 8
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Concentration = mass/ volume.
id I had 10cm cubed of a 0.4g/dm cubed solution, what would the mass be?
Antworten
0.004 g
0.34
0.0009
Frage 9
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mass = moles multiplied by formula or atomic mass.
We have 9 grams of water ( H20).
work out the moles here.
Antworten
0.5
2
8
Frage 10
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moles = volume * concentration.we have HCL with a concentration of 2 mols, and a volume of 20cm cubed. We also have a volume of 25 cm cubed of NaOH.
What is the concentration of NaOH?