A Level H2 Chemistry 2012 Paper 1 Answers New! -

(a) Write an equation for the reaction between zinc and dilute nitric acid.

\[Ethalal can be prepared by oxidizing ethanol using a mild oxidizing agent, such as potassium dichromate(VI) in acidic conditions.\]

(b) Explain why the ionization energy of sodium is lower than that of magnesium. a level h2 chemistry 2012 paper 1 answers

\[Sodium has a lower ionization energy than magnesium because its outermost electron is in a 3s orbital, which is farther away from the nucleus and experiences a lower effective nuclear charge compared to the 3s electrons in magnesium.\]

(b) Explain why the reaction between zinc and dilute nitric acid produces hydrogen gas. (a) Write an equation for the reaction between

\[Zn + 2HNO3 → Zn(NO3)2 + H2\]

\[CO2 is a non-polar molecule because its linear geometry and symmetrical arrangement of polar C=O bonds result in a net dipole moment of zero.\] \[Zn + 2HNO3 → Zn(NO3)2 + H2\] \[CO2

(a) Describe the preparation of ethanal from ethanol.