Moles and Concentrations Flashcards
To calculate mass
N (no. of moles)= m(mass in g)/Da (molar weight)
Why to we measure in moles
To find the amounts of substance in a concentration
How to find No. of moles/ con
C (con) = N (no. of moles)/volume (L)
What is log 10?`
1
How to conjugate a base?
to find the acid of a base: add a proton
to find the base of an acid: take a proton
Example
Acid Base
HCl- Cl-
H3O+ H20
When can water dissociate?
Water can disassociate when the covalent partnerships are disrupted resulting in hydronium and hydrox. ions
How can you measure the acidity of a solution?
How many H30+ ions or H+ are present –> to measure the pH scale
What does the pH scale tell you?
It tells you how many hydronium ions have dissociated from water to become apart of a hydronium ion (10 fold change)
Acidic solution?
A solution with a high con. of H+ ions and an low pH value
Basic solution?
A solution with a low con. of H+ ions and a high pH value
What does an acid do?
It donates a proton
What does a base do?
It accepts a proton
What do strong and weak acids in water?
Strong acids completely dissociate in water, weak acids dissociate partially in water
What is the normal pH level for humans?
7.4
What are buffers?
Buffers absorb (accept) and release (donate) protons. This requires the hydronium ion concentration in systems and reduces the overall changes in the molarity of hydronium in a system
