Chemistry
(a) Give balanced equation for the following.
(1) Sodium hydroxide is added to hydrogen chloride.
(2) Sodium aluminate is treated with water.
(b) If the valency of an element is 2, then to which group will this element belong to?
Related Questions
Raju is going to the laboratory for the preparation of sulphuric acid.
(a) Write the equations for sulphuric acid combining directly with metals and non-metals.
(b) Which concentrated acid will oxidise sulphur directly to sulphuric acid ? Write the equation for the same.
(c) What is the name of the process by which sulphuric acid is manufactured ? Name the catalyst used in the process.
Give reasons
(a) Brass is preferred over copper for door settings.
(b) Metals like iron, aluminium, cobalt and nickel become passive (inert) with concentrated nitric acid.
(c) Alloying of gold is done with silver or copper.
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3. Explain why?
Concentrated nitric acid oxidises phosphorus to phosphoric acid according to the following equation:
P + 5HNO3 ⟶ H3PO4 + 5NO2 + H2O
(a) What mass of phosphoric acid can be prepared from 3.1 g of phosphorus?
(b) What mass of nitric acid will be consumed at the same time?