Give reason adding a salt in an acid is a chemical change
Answers
Answer:
acid + hydrogencarbonate → salt + water + carbon dioxide
The carbon dioxide gas produced in these reactions can be tested.
It is a chemical reaction.
Answer:
a.) Physical change. Because change is reversible. We can get salt back by evaporation and then water by condensation.
b.) Chemical change. It will effect the molecular properties of marble.
c.) Physical change. Again it is reversible. We can get water back by condensation.
d.) Chemical change. Phenolphthalien loses in ions in an acid. So it affects is composition.
e.) Physical change. Because during respiration there is no change in our physical properties in the body.
f.) Chemical change. As when a ripening of mango occurs we can't get the fresh manago back. So it affects its chemical properties.
g.) Physical Change. As during breaking of glass no physical properties are changed. Glass remains a glass and form no new compound.
Explanation:
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