Download App

Analytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryAnalytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide3 Marks
Question
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
$Pb(NO_3)_2$ Write balanced equation for this reaction.
✓

Answer

$
Pb \left( NO _3\right)_2+2 NaOH \longrightarrow \underset{\text { White ppt. }}{ Pb ( OH )_2} \downarrow+\underset{\text { colourless }}{2 NaNO _3}
$
In excess of alkali, white precipitate of $Pb ( OH )_2$ becomes soluble :
$
Pb ( OH )_2+2 NaOH (\text { excess }) \longrightarrow \underset{\text { Sodium Plumbate (colourless) }}{ Na _2 PbO _2+2 H _2 O }
$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Question Answer]" from Analytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide→Analytical Chemistry Uses of Ammonium Hydroxide and Sodium Hydroxide — all question types→Chemistry STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

Give the names of any three alkyl radicals. How are they formed?
→
(a) Hydrogen is burnt in a greenish-yellow gas A then another gas B is formed. The gas B gives dense white fumes with ammonia liquor. Name the gases A and B.
(b) Write chemical equations in support of your answer in (a).
→
Give reason for the following:
Aqua regia dissolves gold and platinum.
→
Samples of the gases $O _2, N_2, CO _2$ and CO under the same conditions of temperature and pressure contain the same number of molecules x . The molecules of oxygen occupy V litres and have a mass of 8 g under the same conditions of temperature and pressure
What is the volume occupied by:
(a) x molecules of $N _2$
(b) $3 x$ molecules of CO
(c) What is the mass of $CO _2$ in grams?
(d) In answering the above questions, which law have you used?
→
Find the percentage of phosphorus in the fertilizer superphosphate $Ca(H_2PO_4)_2$
→
Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions. Tabulate your answers in the format given below:
(i) When silver nitrate solution is added to asolution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
(ii) Addition of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black.
(iii) When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test, a brown ring is formed.
(iv) When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
(v) Addition of dilute hydrochloric acid to E produces an effervescence. The gas produced turns limewater milky but does not affect acidified potassium dichromate solution.
Salt Anion
A
B
C
D
E
→
Give equation for the reduction of Lead (II) oxide
→
Write the observation, and balanced equation for the following reaction:
Excess of ammonium hydroxide is added to a substance, obtained by adding hydrochloric acid to silver nitrate solution.
→
What volume of oxygen is required to burn completely a mixture of $22.4 dm ^3$ of methane and $11.2 dm ^3$ of hydrogen into carbon dioxide and steam?
$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$
$2H_2 + O_2 \rightarrow 2H_2O$
→
Answer the following question :
What is the difference between calcination and roasting.
→