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i reallly new help in physical science, can anyone help me?

i reallly new help in physical science, can anyone help me? - Physics Forum

i reallly new help in physical science, can anyone help me? - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


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Old 06-22-2009, 06:18 PM
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Default i reallly new help in physical science, can anyone help me?



Which of the following does not affect the rate at which a solid dissolves in a liquid?
change in temperature
increasing the pressure
grinding the solute
stirring the mixture

Using the solubility curves of Figure 10-5 of your work-text, find the amount of potassium chlorate needed to saturate 100 milliliters of water at 40C.
5 grams
15 grams
55 grams
60 grams

All of the following are characteristics of colloidal particles EXCEPT
exhibit brownian motion.
have an electrical charge.
settle upon standing.
reflect light.

When a water solution of an acid is placed on red and blue litmus paper,
no change is observed.
the red litmus turns blue.
the blue litmus turns red.
the red litmus becomes blue and the blue litmus becomes red.

The process in which molecules in the liquid phase escape into the gas phase is
evaporation.
fractional distillation.
chromatography.
distillation.

As heat is removed from water, the water molecules
speed up and attract each other.
speed up and repel each other.
slow down and attract each other.
slow down and repel each other.

Salts may be prepared by
the neutralization of acids and bases.
a hydrolysis reaction.
the reaction of water and a very reactive metal.
dissolving certain gases in water.

Salts may be prepared by
the neutralization of acids and bases.
a hydrolysis reaction.
the reaction of water and a very reactive metal.
dissolving certain gases in water.

The process by which solute molecules stick to a solid surface is called
distillation.
adsorption.
absorption.
fractional distillation.

Which of the following is not a purification method?
aeration
coagulation
filtration
evaporation

Which of the following does not describe an electrolyte?
conducts electricity
contains charged particles
aqueous solution of alcohol
aqueous solution of sodium chloride
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