Radioisotopes giving off dangerous ionising radiation Harmful to the environment. An acid solution is defined as one with a pH of less than 7, neutral solutions have a pH of 7 or as near as make no difference if the solutions has acidic or alkaline properties and alkaline solutions have a pH of over 7.
Powdered limestone CaCO3, calcium carbonate is slower and less effective. Alkalis are important chemicals in many industrial processes e.
So all of this is still pretty important chemistry even for the 21st century, with strong links to agriculture, the environment and leading a stressful life!
Chemicals that can act as oxidising agents e. See hazard warning signs further down the page and also " Investigation of Indigestion Tablets ". Acid rain makes water too acid for some aquatic organisms to live and this in turn affects food chains e.
The lower the pH the more acid the solution. These are important agri—chemical fertilisers supplying nitrogen to the soil for better plant growth.
All three chemicals react with acids to neutralise them. Citric acid is found in citrus fruits and is used as a food and drink flavouring, as is tartaric acid. Also includes substances like bromine. Eventually harmless calcium sulfate solution is formed.
The alkali ammonia NH3 is a component in some oven cleaners and will react with fatty acids. Wasp stings are supposed to be alkaline, but apparently not so! More body chemistry, preferably to be avoided! Acidic bee stings pH 5. The equally strong alkali potassium hydroxide KOH is used in alkaline batteries.
Sodium carbonate is made from calcium carbonate limestone and common salt sodium chloride by the Solvay Process. Table salt, used in preserving food and sprinkling over your fish and chips as a flavouring etc. The strong alkali sodium hydroxide NaOH is used bleaches and other cleaning products.
Limescale is the build—up of a limestone like deposit in areas of hard water.is and in to a was not you i of it the be he his but for are this that by on at they with which she or from had we will have an what been one if would who has her.
GCSE Science Revision: GCSE Videos These videos cover the older outgoing GCSE Science spec which has final exams in These videos are aimed at the AQA spec but there is a lot of cross-over with other exam boards such as Edexcel.
OCR GCSE Science experiment cards include practical experiments that you can recreate in the classroom.
Titration of an Acid with an Alkali using Phenolphthalein Indicator or a pH Meter. Acids and Alkalis.
Neutralisation and Salts. What is Neutralisation?. A pH of 7 is neutral. An acid has a pH of less than 7. An alkali has a pH of more than An acid is neutralised when it reacts with an alkali, a base a carbonate or a metal.
When neutralisation is complete there is no more acid left, the pH is 7 and the solution will contain a neutral salt.
See the ionic equation for.
Gcse Bitesize Science Coursework. BBC Bitesize – GCSE Science Science is the systematic study of the physical and natural world through observation and experimentation.
for GCSE Geography providing select and represent data as well as even if you are doing your coursework through a Neutralisation Coursework – GCSE Science – Marked by.Download