Advertisements
Advertisements
Question
Explain the following method with example.
Direct combination
Advertisements
Solution
Direct combination i.e. by heating two elements together
\[\ce{Metal + Non metal -> Salt}\]
\[\ce{2Na(molten) + Cl2 -> 2NaCl}\]
\[\ce{2Fe + 3Cl2 -> 2FeCl3}\]
RELATED QUESTIONS
Distinguish between the given pairs of compounds using the test given within brackets:
A lead salt and a zinc salt (using excess ammonium hydroxide)
How is the following salt prepared:
Sodium nitrate from sodium hydroxide.
Explain why It is necessary to find out the ration of reactants required in the preparation of sodium sulphate.
Write the balanced equation for the preparation of the following compounds, starting from iron and using other substance: Iron (II) chloride
Write equation for the laboratory preparation of the following salt, using sulphuric acid: Iron (II) sulphate from the iron.
Write the equations for the reaction to prepare lead sulphate from lead carbonate.
State the inference drawn from the following observation:
Salt S is prepared by reacting dilute sulphuric acid with copper oxide Identify S.
What is the difference between the chemical nature of an aqueous solution of HCl and an aqueous solution of NH3
Fill in the blanks with suitable words:
An acid is a compound which when dissolved in water forms hydronium ions as the only ______ ions. A base is a compound which is soluble in water and contains ______ ions. A base reacts with an acid to form a ______ and water only. This type of reaction is known as ______.
The following is a list of methods for the preparation of salts.
A – direct combination of two elements.
B – reaction of a dilute acid with a metal.
C – reaction of a dilute acid with an insoluble base.
D – titration of a dilute acid with a solution of soluble base.
E – reaction of two solutions of salts to form a precipitate.
Choose from the above list A to E, the best method of preparing the following salt by giving a suitable equation in the following case:
Copper sulphate.
