Advertisements
Advertisements
प्रश्न
Balance the equation stepwise.
H2S2O7(l) + H2O(l) → H2SO4(l)
Advertisements
उत्तर
H2S2O7(l) + H2O(l) → H2SO4(l)
Step 1: Count the number of each atom on the reactant side:
| Elements | No. of atoms in the reactant |
| H | 4 |
| S | 2 |
| O | 8 |
Step 2: Count the number of each atom on the product side:
| Elements | No. of atoms in the product |
| H | 2 |
| S | 1 |
| O | 4 |
Step 3: Number of atoms of elements on both side is not the same.
If we multiply the product side by 2, then the number of atoms in the product and reactant side gets balanced.
| Elements | No. of atoms in the reactant | No. of atoms in the product |
| H | 4 | 2 × 2 = 4 |
| S | 2 | 1 × 2 = 2 |
| O | 8 | 4 × 2 = 8 |
H2S2O7(l) + H2O(l) → 2H2SO4(l)
APPEARS IN
संबंधित प्रश्न
Methyl orange is used as an indicator. It shows colour change in acid, base and neutral substance. Tabulate your result as follows:
| Indicator | Colour change | Inference |
| Methyl Orange | No change | ...................... |
| .................... | Acid | |
| Yellow | ....................... |
Why should a magnesium ribbon be cleaned before it is burnt in air?
Translate the following statement into chemical equation and then balance it.
Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.
How will you indicate a solution made in water in a chemical equation?
Giving examples, state the difference between balanced and unbalanced chemical equations.
Balance the given chemical equation:
C + CO2 → CO
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are elements.
Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.
State the various characteristics of chemical reactions.
Is Burning of natural gas an endothermic reaction or an exothermic reaction?
Name the various types of chemical reactions.
Write your observations and name the product when
Iron nails are added to an aqueous solution of copper sulphate.
Write word equation for the following skeletal equation:
\[\ce{FeCl2 + Cl2 -> FeCl3}\]
Write your observation for the following chemical reaction and name the product formed :
When ammonium chloride is heated with sodium hydroxide.
Write symbolic representation for the following word equation and balance them :
Calcium carbonate → Calcium oxide + Carbon dioxide.
Balance the following equation. Also name the products formed.
\[\ce{Ag + S -> Ag2S}\]
Balance the following equation. Also name the product formed.
CO2 + C → CO
Complete the following equation:
CH4 + O2 —>
In the experiment for determining the percentage of water absorbed by raisins, we do the final weighing of the raisins after keeping them dipped in water for about one hour. For the accuracy of the result, the extra water from the surface of the soaked raisins is removed by
Balance the equation stepwise.
Ag(s) + HCl(aq) → AgCl ↓+ H2 ↑
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Write the chemical equation for the following word equation and balance them.
Magnesium + Sulphuric acid → Magnesium sulphate + Hydrogen
Balance the following equation:
HNO3 + H2S → NO2 + H2O + S
Write the balanced chemical equations of the following reactions.
chlorine + sulphur dioxide + water → sulphuric acid + hydrogen chloride
Write the balanced chemical equation of the following reaction.
potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine
How is a flame test performed?
Write word equation for the following molecular equation:
\[\ce{H2 [g] + Cl2 [g] ->[sunlight] 2HCl}\]
Word equation:
State which form of energy is utilised in the above chemical reaction.
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Copper [II] sulphate to sodium hydroxide.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
Give reason for the following:
Silver salts are kept in dark coloured bottles.
An element X is trivalent. Write the balanced equation for the combustion of X in oxygen.
Balance the following simple equation:
Mg + N2 → Mg3N2
Balance the following simple equation:
H2 + O2 → H2O
Balance the following simple equation:
Mg + CO2 → MgO + C
Write a balanced equation for the following word equation:
Potassium nitrate → Potassium nitrite + Oxygen
Write a balanced equation for the following word equation:
Potassium bicarbonate → Potassium carbonate + Water + Carbon dioxide
Fill in the blank with the correct word from the options given below:
A chemical equation is a shorthand form for a _______ change.
Writing a chemical reaction in brief by using chemical formulae is called as _______.
Which among the following is(are) double displacement reaction(s)?
- `"Pb" + "CuCl"_2 -> "PbCl"_2 + "Cu"`
- `"Na"_2"SO"_4 + "BaCl"_2 -> "BaSO"_4 + 2"NaCl"`
- `"C" + "O"_2 -> "CO"_2`
- `"CH"_4 + 2"O"_2 -> "CO"_2 + 2"H"_2"O"`
To balance the following chemical equation the value of x and y should respectively be:
\[\ce{2NaOH + xAl_2O_3->yNaAlO_2 + H_2O}\]
