Calculations in topic 2 chemistry quiz

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

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

In a cation precipitation reaction test, we added sodium hydroxide to Aluminium (3+) , what was the colour of the precipitate formed?

In a cation precipitation reaction test, we added sodium hydroxide to iron (3+), what was the color of the precipitate formed?

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?

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?

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?

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

mass = moles multiplied by formula or atomic mass.
We have 9 grams of water ( H20).
work out the moles here.

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?