ions

Question 1

what is the formula of a nitrate ion

Answer 1

NO3 -

Question 2

what is formula for a carbonate ion

Answer 2

CO3 2-

Question 3

what is the formula for a sulphate ion

Answer 3

SO4 2-

Question 4

what is formula for an ammonium ion

Answer 4

NH4+

Question 5

what is the colour of the halogen Cl 2 dissolved in water

Answer 5

pale green

Question 6

what is the colour of the halogen Br 2

Answer 6

orange solution

Question 7

what is the colour of the halogen I2 dissolved in water

Answer 7

brown solution

Question 8

what is the colour of I2 dissolved in cyclohexane

Answer 8

purple

Question 9

what is the test and positive result for cl ions

Answer 9

react with AgNO3, forms a white precipitate soluble in dilute ammonia

Question 10

what is the test and positive result for Br ions

Answer 10

react with AgNO3, forms a cream precipitate that is soluble in conc ammonia

Question 11

what is the test and positive result for I ions

Answer 11

react with AgNO3 forms a yellow precipitate, not soluble in ammonia

Question 12

what is the test and positive result for carbonate ions

Answer 12

react with any acid, bubbling + turns limewater cloudy,

Question 13

what is the test and positive result for Sulfate ions

Answer 13

react with barium ions eg. Ba(NO3)2 will produce a white precipitate

Question 14

what is the order of tests for halide ions

Answer 14

carbonate test then sulfate test then halide test.

Question 15

what is the test and positive result for ammonium ions

Answer 15

react with NaOH and heat, will turn damp red litmus paper blue.