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WorksheetspH, mixtures and separation mehotds
Total questions: 32
Worksheet time: 26mins
What is the equation for calculating pH?
pH = [H+]
pH = log [H+]
pH = -log[OH-]
pH = -log [H+]
If the hydronium ion H3O+ concentration is equal to the hydroxide ion OH- concentration, the solution is a(n)
acid
base
salt
neutral solution
What is the only substance with a neutral pH of 7?
Milk
Orange Juice
Pure Water
Blood
All Water
In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?
Both of the solution are bases
Both of the solution are acids
The Baking soda is an acid and the Bleach is a base
The baking soda is a base and the Bleach is an acid.
Water has a neutral because
it has more H+ ions than OH-
it has more OH- ions than H+
it does not produce any ions
it has an equal amount of H+ and OH- in solution
A chemical has a pH = 6. It would be best described as
Strong acid
Strong base
Weak acid
Weak base
What does pH measure?
the amount of hydrogen (H+) ions
the amount of hydroxide (OH-) ions
amount of water
all of the above
Which list of pHs are in order of increasing H+ ions?
6, 9, 12
9, 12, 6
12, 9, 6
9, 6, 12
Which of the following pH values represents the greatest concentration of H+ ions?
3
6
9
1
Which of the following pH values represents the greatest concentration of -OH ions?
3
6
9
1
The point in an acid-alkali titration at which the reactants just react completely with each other is called the __________ point.
equivalence point
end point
Volumetric analysis can be defined as_____________
The determination of the identity of the solution
The determination of the mole of a mixture with a known solution
The determination of the concentration of a solution using a solution of known concentration
A chemical used to show the end point of titration is called
base
indicator
pipette
acid
What separation method is used to separate substances by their boiling point?
Filtration
Evaporation
Crystallization
Distillation
What is the need of separating mixtures?
to obtain specific substances
to break down compounds
for mixing in more substances
to make more substances from the substances mixed
What is the name of this separation technique?
Distillation
Filtration
Boiling
Evaporation
Which separation technique is used to obtain pure water from seawater?
Distillation
Filtration
Chromatography
Evaporation
Filtration is a method used to separate:
A liquid from a gas
A solid from a liquid
A gas from a liquid
A solid from a solid
It is a technique or method used to separate mixtures of dissolved chemicals/substances.
chromatography
solution
chromatogram
evaporation
Which of the following is an effective way of purifying liquids containing suspensions?
crystallization
decanting
separating funnel
centrifuging
A heterogeneous mixture can be separated by all of the following methods
EXCEPT ____
A. filtration
B. decantation
C. distillation
D. mechanical separation
A student performed a gel electrophoresis experiment. The results are represented in the diagram
below. Compared to the fragments at the top of the gel, the fragments at the lower end are
larger, and move slower
larger, and move faster
smaller, and move faster
smaller, and move slower
What is the purpose of using a decantation funnel in chemistry experiments?
To measure the volume of liquids
To separate immiscible liquids
To conduct titrations
To heat substances
