Ph of a solution and idicators Flashcards
what is an electrolyte
a substance that when you dissolve it in water, will conduct electricity
name three electrolytes
acids, bases and salts
when electrolytes dissolves they dissociate into…
ions
what allows the flow of an electric current?
ions
compounds that do not conduct electricity when dissolved in water are called what?
non-electrolytes
give two examples of non-electrolytes
sugars (glucose) and alcohols (methanol)
what is electrical conductivity?
the ability of a solution to conduct electricity
when you dissolve an acid, base or salt what happens?
they separate into two ions (charged particles) one ion is positive and the other is negative
alkali metals have a charge of?
+1
alkaline earth metals have a charge of?
+2
oxygen family has a charge of?
-2
halogens have a charge of?
-1
what is the ionic dissociation of NaOH?
NaOH -> Na+ + OH-
the material used in a conductivity meter is a…
metal
all solutions conduct electricity because they contain….
ions
a solution is made up of..
a solute and a solvent
define solute
substance that is being dissolved
define solvent
substance that is does the dissolving
define aqueous solution
the solvent is water
the pH of a solution indicates what in a solution?
the concentration of H+
on a pH scale 0 to 6 means its..
acidic
on a pH scale 7 means its..
neutral
on a pH scale 8 to 14 means its..
basic
If the solution is acidic (pH <7) what does that indicate
acids have more H+ ions than OH- ions
if the solution is neutral (pH=7) what does that indicate
neutral solutions have NO ions or equal amounts of H+ and OH- ions
if the solution is basic (pH >7) what does that indicate
bases have more OH- ions than H+ ions
the pH scale is a _________ scale
logarithmic
when the pH value increases by 1 what happens? (scale)
there is a 10 fold decrease in acidity
when the pH value decreases by 1 what happens? (scale)
there is a 10 fold increase in acidity
