Advertisements
Advertisements
प्रश्न
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.
उत्तर
1 mole of Cl2 weighs = 35.5 x 2 = 71 g
So, 0.02 mole will weigh = 71 x 0.02
= 1.42 g
APPEARS IN
संबंधित प्रश्न
Write the balanced equations for the following reaction, and add the state symbols:
Magnesium carbonate reacts with hydrochloric acid to produce magnesium chloride, carbon dioxide and water.
Give one example of a chemical reaction characterised by formation of a precipitate.
What do you understand by exothermic reactions?
The chemical equations are balanced to satisfy one of the following laws in chemical reactions. This law is know as:
(a) law of conservation of momentum
(b) law of conservation of mass
(c) law of conservation of motion
(d) law of conservation of magnetism
The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?
Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins, the extra water left on the surface of soaked raisins was removed by:
Write the balanced chemical equation of the following reaction. sodium hydroxide + sulphuric acid → sodium sulphate + water
A student mixes sodium sulphate powder in barium chloride powder. What change would the student observe on mixing the two powders? Justify your answer and explain how he can obtain the desired change.
What are products? Explain with the help of example.
Write the skeleton equation for the following word equation and then balance them.
- Carbon + Oxygen → Carbon dioxide.
- Phosphorus + Chlorine → Phosphorus pentachloride.
- Sulphur + Oxygen → Sulphur dioxide.
- Magnesium + hydrogen → Magnesium + Hydrogen chloride chloride.
