WorksheetsUnit 9: Acid and Bases
Total questions: 27
Worksheet time: 14mins
What are Electrolytes?
an acid/base that fully dissociates in water
a chemical compound that dissociates into ions and hence capable of transporting a electric charge
an acid/base that does not dissociate in water
concentrations of all elements or substances at equilibrium
Which of these properties of acids NOT accurate?
acids taste sour
acids react with metals producing hydroxide gase
acids destroy bases
acid and bases change the color of acid-base indicators
What is the conjugate acid?
H2SO4
CO3
HSO4
HCO3
What is the ph of a 10^-2M?
1.2 pH
1.3 pH
5.6 pOH
5.9 pOH
is the half-equivalence point the point at which chemically equivalent quantities of bases and acids have been mixed?
true
false
What color does blue litmus paper turn when it is dipped into an acid?
red
green
blue
Which one of these is a flaw to Arrhenius acid definition?
substances that has H+ and donates H+
substances that donates H+
substances that donates OH-
substances that has OH- and donates OH-
what should you do when you touch the phenolphthalein the acid, or NaOH?
use paper towls to wipe it off
wash it off right away
run out the classroom
ask the teacher what to do
what is the first step to start the titration lab?
put on lab goggles
accurately measure the mass of the acid
fill the beaker with water
wait until a faint pink color persists
what is the molarity of H+ when the pH is 6?
0.0001
0.000001
0.1
50
on the pH scale, is a pH of 3 acid or basic?
acid
basic
neutral
what is formed by a salt derived from a strong base and a weak acid?
basic solution
acidic solution
Is H2SO4 a strong acid?
true
false
at half equivalence point....
HA=A-
A-=HA
Keq
Ka=Kb
When bases dissolve in water they produce H+
true
false
What equation do you use for dilution calculations?
MaVa=molesa/molesb x MbVb
M1V1=M2V2
M2V1=M1V2
a^2+b^2=c^2
what makes a strong acid?
has a very high pH
fully dissociates in a base
does not dissociate in water
fully dissociates in water
can we stop ocean acidification?
yes
no
what is equilibrium?
weak acid and bases
includes H2O
a state in which opposing forces or influences are balanced
substances that change color according to pH
can acid and bases be weak or strong electrolytes in aqueous solutions?
yes
no
is an pH of 10 an acid or base
acid
base
What is the LEAST effective way of stopping ocean acidification?
conserving water
change primary source of water
reduce reuse
polluting the ocean
since when has ocean acidification been happening?
2000
1850
500
1500 BCE
What is an end point?
When an indicator changed the color and the titration should be stopped
Equilibrium
When the titration equals the half-equivalence point
Weak Acid+Strong Base
For Dissolving Reactions what equation do you use?
Keq
molesa-molesb
M1V1=M2V2
MaVa=molesa/molesb
True or False?: In neutralization of weak acids the endpoint pH is not neutral it is slightly basic.
true
false
To calculate pOH, what do you do?
log Molarity of OH-
log Molarity of H+
multiply the molarity of OH- and H+
divide the molarity of OH- and H+
