(i) What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube?

Monjur Alahi

(i) What is observed when a solution of potassium iodide is added to a solution of lead nitrate taken in a test tube?
(ii) What type of reaction is this?
(iii) Write a balanced chemical equation to represent the above reaction.


0 like 0 dislike
1 views
Share with your friends

2 Answers

Salim Ahmed Kawsar

Call

(i) A yellow precipitate of lead iodide (PbI2) is formed.
(ii) Precipitation reaction/Double displacement reaction.
(iii) Pb(NO3)2(aq) + 2KI(aq) ------> PbI2(s) +   2KNO3 (aq)
Lead nitrate           Potassium iodide    Lead iodide     Potassium nitrate

                                                              (Yellow ppt.)     

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Salim Ahmed Kawsar

Call

(i) Yellow coloured precipitate is formed due to formation of lead iodide. 

(ii) It is a double displacement reaction. 

(iii) 2KI + Pb(NO3)2 → 2KNO3 + Pbl2

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed.

KCl (aq) + AgNO3 (aq) → AgCl (s) + KNO3 (aq) It is a double displacement and precipitation reaction.

1 Answers 1 views
10 gm of silver nitrate solution is added to 10 gm of sodium chloride solution. What change in mass do you expect after the reaction and why?

No change in mass will take place because mass can neither be created nor destroyed in a chemical reaction as law of conservation of mass states.

1 Answers 1 views
Tincture of iodine has antiseptic properties. This solution is made by dissolving (a) iodine in potassium iodide

(d) iodine in alcohol

1 Answers 2 views
What happens when silver nitrate solution is added to sodium chloride solution? Write the equation for the reaction which takes place.

(i) When silver nitrate solution is added to sodium chloride solution, a white precipitate of silver chloride is formed along with sodium nitrate solution. AgNO3(aq)+ NaCl(aq) --------> AgCl(s) + NaNO3(aq)      ...

1 Answers 1 views
A test tube contains a brown coloured liquid. The colour of the liquid in test tube remains

The element present in the liquid is bromine

1 Answers 1 views
Boojho took some grains of boiled rice in test tube ‘A’ and Paheli took boiled and chewed rice in test tube

In test tube ‘A’ – blue black colour because of presence of starch. In test tube ‘B’ – colour of iodine will not change because of digestion of starch into...

1 Answers 1 views
Acetic acid was added to a solid ‘X’ kept in a test tube. A colourless,

(B) X is NaHCO3, Y is CO2

1 Answers 1 views
Geeta took three water samples in test tubes A, B and C. She added soap solution to all the three test tubes.

(D) Both A and B are soft water

1 Answers 1 views
An aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube.

Al displaces Fe from FeSO4 and forms Al2(SO4)3 which is colourless. The lower end of the test tube becomes warm.

1 Answers 2 views
Water rises in a vertical capillary tube upto a length of 10 cm. If the tube is inclined at 45°, the length of water risen in the tube will be

The correct answer is (b) 10√2 cm Explanation:  When the tube is inclined, the vertical rise remains the same. So the water in the inclined tube rises to 10*sec45° =10√2 cm.

1 Answers 1 views