Advertisements
Advertisements
Question
If HX is a weak acid, what particles will be present in its dilute solution apart from those of water?
Solution
Molecules of HX and H+ and X− ions.
APPEARS IN
RELATED QUESTIONS
Explain, why during the electrolysis of copper sulphate using copper electrodes, the colour of solution does not fade?
The following Question refer to the electrolysis of copper sulphate solution with copper electrodes:
(a) Compare the change in mass of the anode
(b) What is seen to happen to the colour of the copper sulphate solution if platinum electrodes are used? Explain the observation.
(c) What is the practical application of the electrolysis of copper sulphate solution? Briefly, describe one such application.
Write the equations for the reactions, which takes place at the electrodes during the electrolysis of lead bromide?
If a fused metallic chloride is electrolyzed, at which electrode would the metal be obtained?
The following is an extract from metals in the service of man, Alexander and street /Pelican 1976': Alumina (aluminium oxide) has a very high melting point over 2000oC, so that I cannot readily be liquefied. However, conversion of alumina to aluminium and oxygen, by electrolysis, an occur when it is dissolved in some other substance.
(a) Which solution is used to react with bauxite as first step in obtaining pure aluminium oxide?
(b) The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.
(c) Name the element which serves both as the anode and the cathode in the extraction of aluminium.
(d) Write the equation for the reaction that occurs at the cathode during the extraction of aluminium.
(e) Write the equation for the reaction that occurs at the cathode during extraction of aluminium by electrolysis.
(f) Give the equation for the reaction that occurs at the anode when aluminium is purified by electrolysis.
Aqueous solution of nickel sulphate contains \[\ce{Ni^{+2}}\] and \[\ce{SO^{-2}_{4}}\] ions.
- Which ion moves towards the cathode?
- What is the product at the anode?
Fill in the blank from the choices given below :
A molecule of _____ contains a triple bond.
M is a metal above hydrogen in the activity series and its oxide has the formula M2O. The oxide when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. In the above context answer the following:
- What kind of combination exists between M and O?
- How many electrons are there in the outermost shell of M?
- Name the group to which M belongs.
- State the reaction taking place at the cathode.
- Name the product at the anode.
Give reasons why although copper is a good conductor of electricity, it is a non-electrolyte.
A strip of copper is placed in four different colourless salt solutions. They are KNO3, AgNO3, Zn(NO3)2 and Ca(NO3)2. Which one of the solutions will finally turn blue?
