The properties of carbon dioxide gas
Carbon dioxide gas is produced from the breathing of humans and animals , It is produced from the combustion of coal or hydrocarbons , the fermentation of liquids , and It is a colorless , tasteless and odorless gas .
Properties of carbon dioxide gas
Carbon dioxide gas ( CO2 ) one of the most stable of all molecules as it consists of a single carbon atom covalently bonded to two atoms of oxygen , and this bond is very strong , and it is a gas at standard temperature and pressure .
Carbon dioxide gas can change the pH of water and it dissolves slightly in the water to form a weak acid called carbonic acid , and it is a greenhouse gas as it transmits visible light but it absorbs strongly in the infrared and near-infrared .
Most carbon dioxide units are slightly acidic by nature , the level of acidity can be modified by dissolving the molecules in the water , it is soluble in ethanol and in acetone , It is easily dissolves in the water , so it is not collected by the displacement of water .
Carbon dioxide gas reacts with alkalis to give carbonates and bicarbonates , it is a linear covalent molecule , it is an acidic oxide , and it reacts with the water to give carbonic acid .
Carbon dioxide gas reacts with magnesium to form magnesium oxide ( white powder ) and carbon or coal ( black substance ) that deposits on the wall of the cylinder .
Carbon dioxide gas does not burn and does not help in burning , so it is used in extinguishing the fires , and it is heavier than the air , so it is collected by upward displacement of air .
Carbon dioxide gas is prepared by adding dilute hydrochloric acid to calcium carbonate , it is prepared by upward displacement of air because it is heavier than the air , and it is not collected by displacement of water as it easily dissolves in the water , and it is also prepared by adding lemon juice or vinegar to sodium bicarbonate ( the backing powder ) .
Carbon dioxide gas forms a solid substance at temperatures below -70 degrees Celsius ( -94° Fahrenheit ) , It may also transform into a liquid when it is dissolved in the water under constant pressure , it is very stable , and it is largely unaffected as it interacts with many other materials in the atmosphere .
When we inhale carbon dioxide gas at concentrations much higher than the usual atmospheric levels , it can produce a sour taste in the mouth and a stinging sensation in the nose and throat , as carbon dioxide gas dissolves in the mucous membranes and saliva , and it forms a weak solution of carbonic acid .
Carbon dioxide gas molecule is moderately reactive and is non-flammable , but it will support the combustion of metals such as magnesium , it contains two double bonds and it has a linear shape , It has no electrical dipole , and it is fully oxidized .