Gas Tests Flashcards
How to test for hydrogen gas?
Squeaky Pop test
Place a lit splint into the tube with the hydrogen gas and it will produce a pop sound when the gas is burnt.
How to test for carbon dioxide?
Lime water turns cloudy
Bubble/ when carbon dioxide is added to limewater the solution goes from colourless to cloudy/milky.
How to test for oxygen?
Get a glowing splint and put it in a tube with oxygen. Then the splint will reignite. This is because oxygen supports combustion.
How to test for chlorine?
Get a damp blue litmus paper and place it in a test tube with chlorine gas. The litmus paper will turn from blue to red and then finally bleach white.
How to test for acidity of substances?
The strength of an acid is a measure of how much an acid compound ionise.
What determine an acid?
Acids are formed when a compound dissolve in water and ionise to add hydrogen ions into the solution. All acids have hydrogen.
How is something a strong acid and weak acid?
Strong acids fully ionise in solutions to release all the hyrdogen ions.
While Weak acids do not fully ionise.
What is concentration?
Concentration is the amount of solute in a given amount of solvent/space.
Mass/volume
Metal + Acid
Salt + hydrogen
Metal oxide + Acid
salt + water
Metal hydroxide + Acid
Salt + water
Metal carbonate + Acid
Salt + water + carbon dioxide
How to name the salt
- Write the Metal ion name
- Write the non-metal ion name ending with ide or ate- if extra oxygen or non-metal is needed.
What salt does hydrochloric acid make?
HCI
Metal Chloride salt
What salt does sulfuric acid make?
HSO4
Metal Sufate salt
What salt does nitrate acid make?
HNO3
Metal nitrate salt
What does the PH Scale tell?
The PH scale is from 0 to 14 and measure is a substance is acidic or basic.
The PH of a solution measure the concentration of hydrogen ions. The higher the concentration of hydrogen ions are, the lower the PH is.
What is Vinegar name in science?
Ethonoic acid
What colour of percipitate does copper form?
Blue percipitate is by copper ion.
What colour percipitate does iron 2 forms?
Iron 2 form a green percipitate
What colour percipitate does iron 3 forms?
Iron 3 forms a orange percipitate.
What colour percipitate foes ar forms?
Ar form a brown percipitate
What solution is Iodine?
Yellow
What sollution is Copper?
Blue
Flame test colours
Copper = green
ca= red to organge
sodium= yellow
pottasium= lilac
lithium= red
