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A sample of hydrochloric acid has a pH of 2.34. 
Write an expression for pH and calculate the concentration of this acid.

pH = -log([H+])

Therefore, 10^(-pH) = [H+]

[H+] = 4.57x10^-3

CN
Answered by Charlie N. Chemistry tutor
11597 Views

Explain the flow of ions during an action potential of a typical neurone

There are numerous ionic fluxes during an action potential, which involves depolarisation, repolarisation and hyperpolarsation. During depolarisation, voltage-gated sodium ion channels open. In turn, sodi...

AS
Answered by Annie S. Biology tutor
5067 Views

Find the values of x where the curve y = 8 -4x-2x^2 crosses the x-axis.

A curve crosses the x-axis when y=0, if we put that into the equation above we get the quadratic equation 0=8-4x-2x2. The solutions to this equation are the values of x where y=0, which is the ...

HW
Answered by Hannah W. Maths tutor
7763 Views

What factors affect the lattice enthalpy of an ionic solid?

We must remember that negative energies (in any context) generally represent energetically stable configurations and as the energy of a system increases, it will become more unstable.

Firstly, ioni...

SD
7764 Views

Write a commentary of the 7th page of 'Waiting for Godot' by Samuel Beckett. (Question for an Unseen English Literature Exam)

Samuel Beckett through dialogue and stage directions points to the irony of man’s position- humorously exploring how man who has little knowledge will speak and take action in life as if he understands it...

FE
Answered by Farida E. English tutor
3416 Views

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