How Useful Are Acids And Alkalis Essay - gadasih.info.
Many chemicals can be classified as being acidic, neutral or alkaline by using indicators. The pH scale is used to measure acidity and alkalinity. When an acid is neutralised, it forms a salt.
GCSE Chemistry Revision and worksheets on acids and alkalis can be accessed via this dedicated page. Revise GCSE chemistry today.
Alkalis can help soften potable water and remove impurities such as manganese, fluorides and organic tannins. According to the National Lime Association, heavy industries use alkali in the form of lime to absorb and neutralize sulphur oxides to aid in reducing acid rain.
When an acid is added to an alkali or an alkali added to an acid, Neutralisation takes place: the substance changes pH to become closer to being neutral. If an alkali is added to acid then the pH will go up (e.g. from pH 3 to pH 7) If an acid is added to an alkali then the pH will go down (e.g. from pH 12 to pH 7) Neutralisation is sometimes.
The idea was too see if any of them could be used as pH indicators to see how acid or how alkaline a solution is. They were made into four solutions and tested with three solutions of pH 2, 7 and 11. From the results, which do you think would make the most useful indicator.
Properties of acids1. They are liquids.2. They are solutions of compounds in water.3. If concentrated they can be corrosive.4. Acids taste sour (for example, vinegar).5. Turn blue litmus paper red - this is an easy test for an acid!6. Usually react with metals to form salts.7. Acids contain hydrogen ions.8. Turn Universal Indicator from green to red, and have a pH less than 7.Examples of acids.
Kids experiments: Finding Acids and Alkalis in your home and every day life. Using universal indicator papers to help decide if item is an acid, neutral or an alkalis.