Tests for negative ions (carbonate,sulfate and halide)- SC25

Question 1

what is the test for carbonate ions? what is a positive result?

Answer 1

add dilute HCL. Bubble ga sthrough limewater and - positive turns cloudy

Question 2

what is the test for sulphate ions? what is a positive result?

Answer 2

add dilute HCl (removes carbonate ions that may give precipritate) add barium chloride (BaCl2) - white precipritate forms

Question 3

what is the symbol for carbonate ions?

Answer 3

C03^2-

Question 4

what is the symbol for sulphate ions?

Answer 4

SO4 ^2-

Question 5

what are the symbols for hallide ions? (all 3)

Answer 5

Cl-, Br-,I-

Question 6

What is the test for hallide ions?

Answer 6

few drops of nitric acid (HNO3) which removes carbonate ions, then silver nitrate solution (AgNO3)

Question 7

what is true about silver fluoride that is not true for other silver halides?

Answer 7

soluble in water

Question 8

what is the precipritate colour for chloride?

Answer 8

white

Question 9

what is the precipritate colour for bromide?

Answer 9

cream

Question 10

what is the precipitate colour for iodide?

Answer 10

yellow