English

Write the Balanced Chemical Equations of the Following Reactions. Potassium Dichromate + Sulphuric Acid → Potassium Sulphate + Chromium Sulphate + Water + Oxygen.

Advertisements
Advertisements

Question

Write the balanced chemical equation of the following reaction.

potassium dichromate + sulphuric acid → potassium sulphate + chromium sulphate + water + oxygen.

One Line Answer
Advertisements

Solution

2K2Cr2O7 + 8H2SO4 → 2K2SO4 + 2Cr2(SO4)3 + 8H2O + 3O2

shaalaa.com
  Is there an error in this question or solution?
Chapter 1: The Language of Chemistry - Exercise 1 (C) [Page 19]

APPEARS IN

Selina Concise Chemistry [English] Class 9 ICSE
Chapter 1 The Language of Chemistry
Exercise 1 (C) | Q 8.15 | Page 19

RELATED QUESTIONS

When the solution of substance X is added to a solution of potassium iodide, then a yellow solid separates out from the solution.

  1. What do you think substance X is likely to be?
  2. Name the substance which the yellow solid consists of.
  3. Which characteristic of chemical reactions is illustrated by this example?
  4. Write a balanced chemical equation for the reaction which takes place. Mention the physical states of all the reactants and products involved in the chemical equation.

While performing the experiment with raisins to determine the percentage of water absorbed by them, a student made following measurements:

Mass of water in the beaker = 40 g

Mass of raisins before soaking = 5 g

Mass of raisins after soaking for 2 hours = 8 g

Mass of water left in the beaker after the experiment = 35 g

The percentage of water absorbed by raisins is:


Write the balanced chemical equation of the following reaction. sodium hydroxide + sulphuric acid → sodium sulphate + water


\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate the mass of chlorine gas formed.


Considering the relationship in the first pair, complete the second paie :

AgCI : White :: CuI2 : ___________


Write word equation for the following molecular equation:

\[\ce{CuSO4 + 2NaOH -> Na2SO4 + Cu(OH)2↓}\]

Word equation:

State the colour of the products.


A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – copper carbonate.


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.


Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×