Question

(b)Two students Sam and Rohit were performing experiments in the science lab. Sam mixed 10.6 g of sodium carbonate in a conical flask with 12 g of hydrochloric acid in an ignition tube. He took care that the solutions did not mix with each other. He then put a cork on the conical flask and weighed the flask with the ignition tube and its contents. After weighing the flask for the first time Sam tilted it and allowed the solutions to mix and react. He then weighed the conical flask again. Sam found that the mass of the flask with its contents both before and after the experiment was the same.Rohit mixed 10.6 g of sodium carbonate in a conical flask with 12 g of Hydrochloric acid in ignition tube. He took care so that the solutions did not mix with each other. He weighed the flask with the ignition tube and its contents. He then tilted the conical flask to allow the solutions to mix and react. After the experiment, Rohit again weighed the conical flask. Rohit found that the mass of the flask with its contents both before and after the experiment was the not the same.(i) State the law which was being tested in the experiment.(ii) Why did Rohit get a difference in the mass?​

Answer 1

Explanation:

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☆We need water for drinking, cooking, bathing, and cleaning. Without Water, life would be impossible on the planet. Water is found on the Earth in the form of rivers, oceans, seas, ponds, lakes, streams, and glaciers. The composition of Water remains the same throughout the Earth.

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Sam use HCL 23%of total acid.

Answer 2

Answer→Real Lab Procedure

→Real Lab ProcedurePreparation of 250ml M/10 (0.1 M) sodium carbonate solution

→Real Lab ProcedurePreparation of 250ml M/10 (0.1 M) sodium carbonate solution Using an electronic balance. we’ll first weigh about 2.65g of sodium carbonate crystals in a weighing bottle and transfer these into a 250ml beaker.

→Real Lab ProcedurePreparation of 250ml M/10 (0.1 M) sodium carbonate solution Using an electronic balance. we’ll first weigh about 2.65g of sodium carbonate crystals in a weighing bottle and transfer these into a 250ml beaker.Wash the weighing bottle 2 or 3 times using distilled water and transfer all the washings into the beaker. Dissolve the sodium carbonate crystals in the beaker by gentle stirring with a clean la