Two important uses of washing soda and baking soda are: 1) Washing soda: (a) Washing soda is used to remove permanent hardness of water. (b) It is used for domestic household washing purposes. (c) It is used in glass, soap, and paper industries. 2) Baking soda: (a) Baking powder is prepared by usingRead more
Two important uses of washing soda and baking soda are:
1) Washing soda:
(a) Washing soda is used to remove permanent hardness of water.
(b) It is used for domestic household washing purposes.
(c) It is used in glass, soap, and paper industries.
2) Baking soda:
(a) Baking powder is prepared by using baking soda. Baking powder is formed by the mixture of baking soda with a mild acid known as tartaric acid. When it is heated or mixed in water, CO2 gas is evolved that makes bread or cake fluffy.
(b) Soda-acid fire extinguishers are prepared by baking soda.
(c) It is used in making pakora more crispy.
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat. For example: (i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chRead more
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat.
For example:
(i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chloride and water molecules.
NaOH + HCl –> NaCl + H₂O
(ii) In case of indigestion which caused due to the excess production of hydrochloric acid in the stomach resulting in acidity, to neutralise the effect of acid an antacid, Mg(OH)₂ which is basic in nature is given, thus gives relief from indigestion.
Plaster of Paris (POP) is stored in a moisture-proof container because POP absorbs water vapour from the surrounding and reacts to form a hard mass solid known as gypsum. CaSO₄.1/2H₂O+ 3/2H₂O → CaSO₄.2H₂O
Plaster of Paris (POP) is stored in a moisture-proof container because POP absorbs water vapour from the surrounding and reacts to form a hard mass solid known as gypsum.
(a) Milkman shifts the pH of the fresh milk from 6 to slightly alkaline.This is because in an alkaline condition, milk does not coagulate into curd easily. (b) The milk is slightly more basic than usual milk, as base neutralise the acids produced to set the curd. Therefore, it takes a longer time toRead more
(a) Milkman shifts the pH of the fresh milk from 6 to slightly alkaline.This is because in an alkaline condition, milk does not coagulate into curd easily.
(b) The milk is slightly more basic than usual milk, as base neutralise the acids produced to set the curd. Therefore, it takes a longer time to convert the curd.
Give two important uses of washing soda and baking soda
Two important uses of washing soda and baking soda are: 1) Washing soda: (a) Washing soda is used to remove permanent hardness of water. (b) It is used for domestic household washing purposes. (c) It is used in glass, soap, and paper industries. 2) Baking soda: (a) Baking powder is prepared by usingRead more
Two important uses of washing soda and baking soda are:
1) Washing soda:
(a) Washing soda is used to remove permanent hardness of water.
(b) It is used for domestic household washing purposes.
(c) It is used in glass, soap, and paper industries.
2) Baking soda:
(a) Baking powder is prepared by using baking soda. Baking powder is formed by the mixture of baking soda with a mild acid known as tartaric acid. When it is heated or mixed in water, CO2 gas is evolved that makes bread or cake fluffy.
(b) Soda-acid fire extinguishers are prepared by baking soda.
See less(c) It is used in making pakora more crispy.
What is a neutralisation reaction? Give two examples.
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat. For example: (i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chRead more
A reaction in which an acid and base react with each other to form salt and water is known as neutralisation reaction. During this reaction energy is evolved in the form of heat.
For example:
(i) sodium hydroxide a strong base reacts with strong acid hydrochloric acid produces neutral salt sodium chloride and water molecules.
NaOH + HCl –> NaCl + H₂O
(ii) In case of indigestion which caused due to the excess production of hydrochloric acid in the stomach resulting in acidity, to neutralise the effect of acid an antacid, Mg(OH)₂ which is basic in nature is given, thus gives relief from indigestion.
Mg(OH)₂ + 2HCl –> MgCl₂ + 2H₂O
See lessPlaster of Paris should be stored in a moisture-proof container. Explain why?
Plaster of Paris (POP) is stored in a moisture-proof container because POP absorbs water vapour from the surrounding and reacts to form a hard mass solid known as gypsum. CaSO₄.1/2H₂O+ 3/2H₂O → CaSO₄.2H₂O
Plaster of Paris (POP) is stored in a moisture-proof container because POP absorbs water vapour from the surrounding and reacts to form a hard mass solid known as gypsum.
CaSO₄.1/2H₂O+ 3/2H₂O → CaSO₄.2H₂O
See lessA milkman adds a very small amount of baking soda to fresh milk.
(a) Milkman shifts the pH of the fresh milk from 6 to slightly alkaline.This is because in an alkaline condition, milk does not coagulate into curd easily. (b) The milk is slightly more basic than usual milk, as base neutralise the acids produced to set the curd. Therefore, it takes a longer time toRead more
(a) Milkman shifts the pH of the fresh milk from 6 to slightly alkaline.This is because in an alkaline condition, milk does not coagulate into curd easily.
(b) The milk is slightly more basic than usual milk, as base neutralise the acids produced to set the curd. Therefore, it takes a longer time to convert the curd.
See lessFresh milk has a pH of 6. How do you think the pH will change as it turns into curd? Explain your answer.
Normally the pH of milk is 6, as curd is acidic in nature pH will reduce.
Normally the pH of milk is 6, as curd is acidic in nature pH will reduce.
See less