Calculations in topic 2 chemistry quiz

greenchloe1998
Quiz by , created over 4 years ago

Quiz on Calculations in topic 2 chemistry quiz, created by greenchloe1998 on 02/01/2015.

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greenchloe1998
Created by greenchloe1998 over 4 years ago
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Question 1

Question
choose the correct flame colour for calcium in a flame test.

Question 2

Question
choose the correct flame colour for potassium in a flame test.

Question 3

Question
In a cation precipitation reaction test, we added sodium hydroxide to Aluminium (3+) , what was the colour of the precipitate formed?
Answer
  • blue
  • green
  • white
  • brown

Question 4

Question
In a cation precipitation reaction test, we added sodium hydroxide to iron (3+), what was the color of the precipitate formed?
Answer
  • brown
  • white
  • blue
  • green

Question 5

Question
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?
Answer
  • white
  • cream
  • yellow

Question 6

Question
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?
Answer
  • white
  • cream
  • yellow

Question 7

Question
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?
Answer
  • white
  • cream
  • yellow

Question 8

Question
Concentration = mass/ volume. id I had 10cm cubed of a 0.4g/dm cubed solution, what would the mass be?
Answer
  • 0.004 g
  • 0.34
  • 0.0009

Question 9

Question
mass = moles multiplied by formula or atomic mass. We have 9 grams of water ( H20). work out the moles here.
Answer
  • 0.5
  • 2
  • 8

Question 10

Question
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?
Answer
  • 2 mol dm-3
  • 1.6 mol dm-3
  • 3.8 mol dm-3