Advertisements
Advertisements
प्रश्न
Carbonic acid gives an acid salt but hydrochloric acid does not. Explain.
Advertisements
उत्तर
Carbonic acid is a dibasic acid i.e.; H2CO3. So, when it reacts with a base such as NaOH then there is only partial replacement of hydrogen ions of carbonic acid by sodium ion to form an acid salt as:
H2CO3 + NaOH → NaHCO3 + H2O
In case of hydrogen chloride which is a monobasic acid the salt produced will be normal as :
HCl + NaOH → NaCI + H2O
Concept Insight : Salts formed by partial replacement of hydrogen ions of acid by metallic ions are called acid salts.
APPEARS IN
संबंधित प्रश्न
One of the following does not inject an acidic liquid into the skin through its sting. This is:
(a) honey bee
(b) ant
(c) wasp
(d) nettle leaf hair
Name a sodium compound which is a constituent of many dry soap powders.
Write the chemical name from the given formula.
H2SO4
Define an acid.
Give the name and formula of two : Strong monobasic acids
What is the difference between : An alkali and a metal hydroxide?
Complete the following table and write one equation for each to justify the statement:
|
Reactants |
Products |
Method |
|
Soluble base + Acid (dil) |
Salt + water |
Neutralisation Titration |
|
Metal + Non-metal |
Salt (soluble/insoluble) |
______ |
|
Insoluble base + ______ |
Salt (soluble) + water |
______ |
|
Active metal + Acid (dil) |
______ + ______ |
______ |
|
Soluble salt solution (A) + Soluble salt solution (B) |
Precipitated salt + Soluble salt |
______ |
|
Carbonate/bicarbonate + Acid (dil) |
Salt + ______ + ______ |
Decomposition of carbonate |
|
Chlorides/nitrates + Acid (conc.) |
______ + ______ |
Decomposition of chlorides and nitrates |
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) Temperature of the solution decreases.
(ii) Temperature of the solution increases.
(iii) Temperature of the solution remains the same.
(iv) Salt formation takes place.
You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.
Paheli observed that most of the fish in the pond of her village were gradually dying. She also observed that the waste of a factory in their village is flowing into the pond which probably caused the fish to die.
- Explain why the fish were dying.
- If the factory waste is acidic in nature, how can it be neutralised?
