Basics

Question 1

What is the formula of sulfide?

Answer 1

SO3^2-

Question 2

What is the formula of sulfate?

Answer 2

SO4^2-

Question 3

What is the formula of phosphate?

Answer 3

PO4^3-

Question 4

What is the formula of nitrite?

Answer 4

NO2^-

Question 5

What is the formula of nitrate?

Answer 5

NO3^-

Question 6

What is the formula of carbonate?

Answer 6

CO3^2-

Question 7

What is the definition of the enthalpy change of atomisation?

Answer 7

the change in enthalpy when one mole of bonds is completely broken to obtain atoms in the gas phase.

Question 8

What is the meaning of formula mass?

Answer 8

the sum of atomic masses of the ions present in the formula unit of an ionic compound

Question 9

What is the definition of the enthalpy change of hydration?

Answer 9

the enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution

Question 10

What is the definition of the enthalpy change of neutralisation?

Answer 10

the enthalpy change when solutions of an acid and an alkali react together under standard conditions to produce 1 mole of water