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Chemistry

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Keira Boyle

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Cards in this guide (14)
What are the function of buffer

the function of a buffer is to maintain the pH of the sample.

What is the base-dissociation constant for a weak base

Suppose: B- is symbol for any (soluble) base.

Equilibrium of a base when diluted in water:

B- + H2O <==> HB + OH-

Equilibrium constant:

Keq = [HB] * [OH-] / [B-] * [H2O]

The base dissociation contant is defined by:

KB = [HB]*[OH-]/[B-]

So, KB = Keq*[H2O] = Keq*55.6 mol/L

How do you treat patients

Patients should be treated with humble and love like the way babies are treated.

What does Le Chtelier's principle state

The Le Chtelier's principle states one thing. It is the dynamic equilibrium which is disturbed by changing the conditions and the position of equilibrium moves that makes a change.

What would happen if the equilibrium of a weak acid dissociation reaction were upset

The reaction would shift to balance the change

Which of these describes an ethical dilemma that drug designers could face

A drug for blood pressure is absorbed in the colon. It is effective, but occasionally it can erode the colon walls.

A prosthesis may be nonbiocompatible or otherwise endanger the well-being of the patient it is intended to help.

What information does an acid or base equilibrium constant give

The information an acid or base equilibrium constant gives is that the acidity and base levels are equal to the equilibrium constant multi[plied by the water concentration.

What information does the pH of a solution give

pH of a solution tells us about the nature of a solution( i.e acidic or basic ) if pH of a solution is less than 7 tahn it's acidic if it's 7 then it's neutral and more than seven will make it base.

A concentration unit expressed in units of moles of solute per kilogram of solvent

This is called molality.

What is the acid dissociation constant for an acid at equilibrium HX H X

The dissociation constant is:
k = [H][X]/[HX]

What does Le Châtelier s principle predict would happen to the equilibrium conditions if N2O4 were added to the system

I suppose that the principle of Le Châtelier is not applicable in this case.

What are the hydrogen ion and hydroxide ion concentrations in water

These concentrations are supposed to be equal.

What equation is used to calculate the pH of a solution

pH = -log [H+(aq)]. In words, pH is the negative logarithm (to the base 10) of the hydrogen ion concentration.

What equation is for pH

pH=-log[H+]

Edited: it is also pH = 14 - pOH. That is certainly an equation for pH.

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