carbon dioxide, hydrogen and nitrogen from 3 Flashcards
what is a salt
a substance which is formed when the hydrogen part of the acid id replaced by a metal
what happens when zinc reacts with acid
what is the word equation for the preparation of hydrogen gas
- metal disappears to give a colourless solution
- the reaction mixture heats up
- effervescence
zinc + surfuric acid > zinc sulfuric + hydrogen
what are the physical properties go hydrogen
what is the test for hydrogen
what are the uses for hydrogen gas
colourless, odourless, tasteless diatomic gas. insolube in water, lightest element and extremely flammable
lighted splint and squeaky pop
- weather balloons
- potential as a ‘clean fuel’- the hydrogen burns in oxygen to produce water, which is a non pollutant product.
- hardening of oil
what is the general equation for water and carbon dioxide
acid + metal carbonate > salt + water + carbon dioxide
what is the word equation for carbon dioxide
hydrochloric + cacumi carbonate > calcium chloride + water + carbon dioxide
what happens when calcium carbonate reacts with acid
metal carbonate disappears
a colourless solution formed
reaction mixture heats up
effervescence
what are the physical properties, test and uses for carbon dioxide
colourless, odourless gas. fairly soluble in water, denser than air and does not support combustion
colourless solution of limewater turns milky
fizzy drinks, fire extinguisher and dry ice
what are the physical properties of nitrogen
why is there a lack of reactivity
what are the uses
colourless, odourless, tasteless, neutral diatomic gas. denser than air and does not support combustion
due to a very strong bond between the nitrogen atoms. substantial energy is needed to break the bond
food packaging
coolant in refrigerated lorries and in computers
