Observe the following activity and answer the questions. 4<br />Procedure : Fit a bent tube in a rubber cork. Take some lime water in a test<br />tube and keep it handy. Take some baking soda in another test tube and add<br />some lemon juice to it. Immediately fit the bent tube over it. Insert its other<br />end into the lime water. Note down your observations of both the test tubes.<br />1) From above activity which reaction take place.<br />ii) Draw figure of this activity.<br />iii) Which gas is release from this reaction.
Answers
Answer:
1.neutralisation reaction...
2. given above...
e.hydrogen gas and carbon dioxide gas...
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In this activity, when limewater comes in contact with the gas released in the form of an effervescence, it turns milky. This is a chemical test for carbon dioxide gas. When lime water turns milky, we infer that the effervescence is of CO2. This gas is produced on reaction of acids with carbonate and bicarbonate salts of metals. A precipitate of CaCO3 is produced on its reaction with the lime water Ca(OH)2. This reaction can be represented by the following chemical equation.
Ca(OH)2(aq)+ CO2(g) → CaCO3(s)+ H2O(I)
Washing soda is sodium carbonate Na2CO3. It will react same as baking soda (NaHCO3).
Vinegar and HCl are acids, they do not react chemically with lime juice.