Advertisements
Advertisements
Question
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Advertisements
Solution
- When baking soda (Sodium hydrogen carbonate) is mixed with lemon juice (citric acid), bubbles form. The bubbles are formed due to the evolution of carbon dioxide gas, which is a chemical change.
- In this change, the citric acid in lemon juice reacts with sodium hydrogen carbonate, resulting in the evolution of carbon dioxide gas.
\[\ce{\underset{(Sodium bicarbonate)}{Baking Soda} + Lemon juice -> \underset{(CO2)}{Carbon dioxide} + Other substances}\]
APPEARS IN
RELATED QUESTIONS
What do you observe when :
an iron nail is kept in tap water for few days
Out of sodium and sulphur which is a metal? Explain its reaction with the oxygen.
Explain the term reactant and product giving examples.
Give an example of a reaction where the following are involved
Light
Give one example electrochemical reaction.
Name the gases which turn moist red litmus blue.
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
Which of the following is a chemical change?
