Calculate the ph of a 2.0 m solution of hclo4?

Answer is -0.301

Explanation;

pH = -log[H⁺]

HClO₄ gives H⁺ and ClO₄⁻ as the ions by dissociation. The stoichiometric ratio between HClO₄ and H⁺ is 1 : 1. Hence, 2 M of HClO₄ solution gives 2 M of H⁺.

Hence, pH = -log(2) = -0.301

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.