DAMNTHEDUMBDASH

TEST FOR GASES



ammonia gas:
1) place some solid ammonium chloride in the test tube.
2) add dilute sodium hydoxide until the tube is about one-quarter
3) warm the tube gently

gas is colourless, has a pungent smell.

To test for gas. Place a moist red litmus paper over the test tube. If the moist litmus paper turn blue, the gas is ammonia..



carbon dioxide:
1) place small piece of marble in the test tube
2) add dilute hydrochloric acid tll the test tube is about half-full

gas is colourless and odourless.

To test for gas, fit a delivery tube and bubblethe solution with calcium carbonat(limewater). A white precipitate is formed.

chlorine gas:
1) place mark of lead solution in the testtube.
2) add equal volume of dilute hydrochlride acid.

gas is yellowish-green and is pungent.

To test gas, place moist ble litmus paper over the mouth of test tube. The blue litmus will turn red and soon, bleached.

hydrogen:
1) place some zinc powder in the test tube.
2) add dilute hydrochloric acid until test tube is about one-third full.
3) warm the tube gently toproduce a vigorous evolution of gas

the gas is colourless and odourless.

To test gas, hold a burning splint at the mouth of test tube. If gas is present, a "pop" sound will be heard and the flame will be extinguished.

oxygen gas:
1) place hydrogen peroxide solution in test tube until it is about one-third full.
2) add a small amount of magnesium oxide powder. (if necessary, add more powder to prouce a vigorous evolution of gas).

the gas is colourless and odourless.

To test gas, place a lit wooden splint. If gas is present, the lit part will become a burning splint.

sulphur dioxide:
1) place a little sodium sulphite/sulphate.
2) add dilute hydrochloric acid.

the gas is colourless and choking.

To test gas, place one drop of acidified potassium dichromate into the solution on a piece of filter paper. hold the paper above the test tube, the paper of the potassium will turn green.

LOL!! i'm smart huh?!?! ahahah :D suppose to learn this for later's test. it's 5:33AM!! omg omg omg..!! hahaha.
ok byebye people :D:D:D study hard!!