Search our library of Chemistry IB questions

Top answers

Chemistry

Explain why successive ionization energies of an element increase

More energy is required to remove successive electrons from an ion with an increasing positive charge. There is large increases in ionization energy when the 2nd and 10th electrons are removed. This mean...

Answered by Roisin N. • Chemistry tutor

1990 Views

Define the an acid/base according to the Bronsted-Lowry and Lewis theories. Support with equation to illustrate an acid-base reaction for each theory, identifying them clearly. Also state the bond type formed in an Lewis acid-base reaction.

Bronsted-Lowry theory: Acid is a proton donor (H⁺) and base is a proton acceptor, i.e NH₃(aq) + H₂O (l) ⇌ NH₄⁺ (aq) + OH^-(aq) (In the left...

Answered by Agisilaos V. • Chemistry tutor

1987 Views

Butan-2-ol cannot be directly converted to 1,2-dibromobutane. The conversion can be carried out in two stages by first converting butan-2-ol into X, which is then reacted with bromine.(continued in answers)

butan-2-ol --?→ X --Br₂→ 1,2-dibromobutane(a) State the name and draw the structural formula of X(b) State an equation and the conditions needed for the conversion of butan-2-ol into X.(c) Desc...

Answered by Kiril T. • Chemistry tutor

5277 Views

Explain the change in first ionisation energy across period 2

Ionisation energy increases overall because nuclear charge increases with no significant increase in shielding, so it becomes more difficult to remove the outer electron.Ionisation energy decreases going ...

Answered by Amelia I. • Chemistry tutor

11174 Views