Formulas used for calculations in Acidic Environment (1 Viewer)

[housemouse]

List all the formulas used in calculations for the Acidic Environment especially for 3.2 and 3.4

 

[Riviet]

Here are formulae that I can think of from the top of my head:

n = cv

n = M/m

pH = -log₁₀[H⁺]

∆H = mC∆T

n = number of moles, c = concentration or molarity (mol/L), M = mass (g), m = molecular mass, m = mass, C = specific heat capacity of substance/solid, ∆H = molar heat of combustion, ∆T = change in temperature (final temperature - initial temperature)

 

[housemouse]

Yeah thanks for that.

Just with the formula n = V/ Vm

If the question does not specify a temperature do we assume it is 0 degrees celcius or the 25??

 

[Riviet]

We can't assume either, the question should specify at what temperature and pressure.

 

[XcarvengerX]

It will usually be at 100kPa and if the question said that the experiment was done in school laboratory, then we can assume that the temperature is 25 degrees Celcius.

 

[rhia]

[H+][OH-] = K_w = 1.00 × 10^-14

[OH-] = K_w/[H+]
or
[H+] = K_w/[OH-]

pH + pOH = 14