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Acid Rain

Does carbonic...

Question

Does carbonic acid fully ionise in its aqueous solution to form two replacable hydrogen ions and a carbonate ion?

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Solution

Yes , H₂CO₃ dissociates two times and replaces one hydrogen ion on each time thereby resulting into carbonate ion.

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Q. Which of the following is(are) true when

H C l (g)

is passed through water?
I. It does not ionise in the solution as it is a covalent compound.
II. It ionises in the solution.
III. It gives both hydrogen and hydroxyl ion in the solution.
IV. It forms hydronium ion in the solution due to the combination of hydrogen ion with the water molecule.

Q. The hydrogen ion concentration in pure water is

10^{- 7} g . i o n s / l i t

. An aqueous solution will be acidic, if its hydrogen ion concentration in g. ions/ lit. is ____.

Q. Question 27.
Which of the following is/are true when HCl(g) is passed through water?
(i) It does not ionise in the solution as it is a covalent compound.
(ii) It ionises in the solution.
(iii) It gives both hydrogen and hydroxyl ion in the solution.
(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule.

(a) (i) only
(b) (iii) only
(c) (ii) and (iv)
(d) (iii) and (iv)

Q. Question 27.
Which of the following is/are true when HCl(g) is passed through water?
(i) It does not ionise in the solution as it is a covalent compound.
(ii) It ionises in the solution.
(iii) It gives both hydrogen and hydroxyl ion in the solution.
(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule.

(a) (i) only
(b) (iii) only
(c) (ii) and (iv)
(d) (iii) and (iv)

Q. (a) Balance the following chemical equation:

Pb {({NO}_{3})}_{2} (s) \overset{heat}{\to} PbO (s) + {NO}_{2} (g) + O_{2} (g)

(b) State two characteristic features of carbon which when put together give rise to a large number of carbon compounds.
(c) Describe an activity to show that acids produce ions only in aqueous solutions.

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