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Basic Lead Carbonate

The formula o...

Question

The formula of basic lead carbonate is ${(P b C O_{3})}_{x} \cdot P b {(O H)}_{x}$ .
The value of $x$ is:

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Solution

The formula of basic lead carbonate is $2 P b C O_{3} . P b {O H}_{2}$ .
Therefore, the value of $x$ is $2$ .

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Basic Lead carbonate is also known as

Q. Write the formulae of sodium chloride and sodium carbonate. Explain why an aqueous solution of sodium chloride is neutral but an aqueous solution of sodium carbonate is basic (or alkaline). Write chemical equations of the reactions involved.

Q. The preparation of lead sulphate from lead carbonate is a two-step process (lead sulphate cannot be prepared by adding dilute sulphuric acid to lead carbonate.)
(i) What is the first step that is required to prepare lead sulphate from lead carbonate?
(ii) Write the equation for the reaction that will take place when this first step is carried out.
(iii) Why is the direct addition of dilute sulphuric acid to lead carbonate an impractical method of preparing lead sulphate?

Q. The formula of sodium tungstate is

N a_{2} W O_{4}

and that of lead phosphate is

P b_{3} (O P_{4})_{2}

. What is the formula of lead tungstate ?

(a) Why are alkali metals kept in kerosene oil?

(b) What is :

(i) basic lead carbonate and

(ii) brown powder deposit on iron?

(c) Why is hydrogen kept in the metal activity series?

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Basic Lead Carbonate

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