Advertisements
Advertisements
Question
What information does the following chemical equation convey?
Zn + H2SO4 → ZnSO4+ H2
Advertisements
Solution
This equation conveys the following information:
The actual result of a chemical change.
Substances take part in a reaction, and substances are formed as a result of the reaction.
Here, one molecule of zinc and one molecule of sulphuric acid react to give one molecule of zinc sulphate and one molecule of hydrogen.
Composition of respective molecules, i.e. one molecule of sulphuric acid contains two atoms of hydrogen, one atom of sulphur and four atoms of oxygen.
Relative molecular masses of different substances, i.e. molecular mass of
Zn = 65
H2SO4 = (2+32+64) = 98
ZnSO4 = (65+32+64) = 161
H2 = 2
22.4 litres of hydrogen are formed at STP.
APPEARS IN
RELATED QUESTIONS
Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction.
Write your observation for the following chemical reaction and name the product formed :
When manganese dioxide is added to potassium chlorate and heated.
In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode?
Balance the following equation:
PbO + NH3 → Pb + H2O + N2
(a) Give only one suitable chemical test to identify the following gases.
- Ammonia
- Sulphur dioxide
- Hydrogen Chloride
- Chlorine
- Carbon Dioxide
- Oxygen
- Hydrogen
(b) Select a basic gas mentioned in Q.1 (a). How is the basic nature suspected?
(c)Select acidic gases from the gases mentioned in Q.1 (a). How is the acidic nature suspected?
(d) State the gas responsible for bleaching action.
(e)Which gas turn blue cobalt chloride paper light pink?
Give an example of a chemical equation in which two reactants form:
three product
Balance the following simple equation:
SO2 + O2 ⇌ SO3
Balance the following simple equation:
\[\ce{Ca(OH)2 + HNO3 -> Ca(NO3)2 + H2O}\]
Write a balanced equation for the following word equation:
Lead dioxide [lead (IV) oxide] → Lead monoxide + Oxygen
Balance the given chemical reaction as per the instructions below.
\[\ce{NaOH + H2SO4 -> Na2SO4 + H2O}\]
Balance the equation with proper coefficient and rewrite the equation.
