Acids, Bases and Salts

Metal compound A reacts with dilute hydrochloric acid to produce Calcium Chloride, the gas evolved CO2 with brisk effervescence. Hence, metal A should be Calcium Carbonate. Hence, the reaction between Calcium Carbonate and HCl is CaCO3 (s) + 2HCl (Aq) → CaCl2( Aq) + CO2 (g) + H2O (l)

When an acid reacts with the metal to produce salt and hydrogen gas. Metal + Acid → Salt + Hydrogen gas

Acids are present in curd and other sour foods, and they combine with metal to form metal. Food becomes poisonous as a result of this reaction, damaging people’s health.

Uses for plaster of Paris Plaster of Paris typically comes in a variety of categories and is used for various purposes. Below, we’ll take a closer look at some of the most popular applications. In  architecture decoration Fine art is created with plaster of paris and used to decorate and adorn buildings and monuments. These …

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Examples of metals – iron, copper, aluminium , magnesium, sodium, lead, zinc and any other metal that is easily available. Metals are generally hard. The hardness varies from metal to metal. Some metals can be beaten into thin sheets. This property is called malleability. e. g – Gold and silver are the most malleable metals. …

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All bases do not dissolve in water. An alkali is a base that dissolves in water. They are soapy to touch, bitter and corrosive. Never taste or touch them as they may cause harm.

pH A scale for measuring hydrogen ion concentration in a solution, called pH scale has been developed. The p in pH stands for ‘potenz’ in German, meaning power. pH Definition Negative logarithm of the H+ or , H3O+ ion concentration. pH = – log [H+] pH scale : pH colour

Prepare your own indicator i) Crush beetroot in a mortar.ii) Add sufficient water to obtain the extract.iii) Filter the extract by the procedure learnt by you in earlier classes.iv) Collect the filtrate to test the substances you may have tasted earlier.v) Arrange four test tubes in a test tube stand and label them as A,B,C …

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