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| 1. |
Explain the chemical properties of acid |
| Answer» Chemical properties of acid:\tAcids change the colour of litmus from blue to red.\tThey convert the colour of Methyl Orange from Orange/Yellow to Pink.\tAcids turn the pink colour of Phenolphthalein to colourless.\tSome Acids are highly corrosive in nature which means that they corrode or rust metals.\tAcids tend to evolve hydrogen gas whilst reacting with an active metal such as Zn, Mg, etc.\tThey produce H+ ions when mixed with water.\tAcids lose their acidity when mixed with a base.\tWhen equal amounts of acid and base are combined the process of neutralization occurs and salt and water is formed, The pH value of acid is from 0-6.\tAcids react with carbonates and hydrogen carbonates to form a salt, water and carbon dioxide gas.\tExtremely active metals such as Potassium (K), Calcium (Ca), Sodium (Na), etc tend to explode when combined with acids.\tWeak Acids like Carbonic Acid doesn’t act with any metal at all.\tNitric Acids doesn’t usually exhibit acidic properties, it exhibits oxidizing properties instead.\tMetals that generally react with dilute acid to form salt and hydrogen are the metals which lie above hydrogen in the metal activity series. Acids form a salt, water and sulphur dioxide while reacting with sulphites and bisulphites.\tAcids and metal sulphides form salt and hydrogen sulphide. | |