Water – Chemistry Flashcard

What is the solute?
The solid that dissolves into the solvent
What is the solvent?
The liquid part that has things dissolve into it
What is the solution?
A mixture of one substance dissolved in another
What does dissolved mean?
When a solute ‘disappears’ into the solvent
Why is water a good solvent?
Because many chemicals dissolve in it
What are some things that dissolve in water?
Sugar, ammonia, cordial, salt, detergent, copper sulfate, blood
What does insoluble mean?
Not capable of being dissolved eg sulfur in water
What does soluble mean?
Able to be dissolved eg CuSO4 in water
What does suspension mean?
A system in which microscopically visible particles are dispersed throughout a less dense liquid or gas from which they are easily filtered but not easily settled because of system viscosity or molecular interactions. eg flour in milk
What is a colloid?
A system in which finely divided particles, which are approximately 10 to 10000 angstroms in size, are dispersed within a continuous medium in a manner that prevents them from being filtered easily or settle rapidly
What does water exist as in nature?
Solid, liquid and gas
In a phase diagram what is the triple point for water?
0.006atm and 0.01degrees celcius
How much of human beings are water?
two thirds
What percentage of our blood is water?
80%
Water has a relatively high what?
Heat capacity, which means it can absorb (and release) large quantities of heat energy with relatively small temperature changes
What is the formula for calculating density?
Density= mass/volume
What are the three intermolecular bond types?
Ionic, Hydrogen, Dipole-Dipole
What type of molecule is water?
A polar molecule
What is a polar molecule?
Where one end of a molecule has a different charge to the other
What is overall polarity?
Where a molecule contains more than one polar bond, the polarity of the molecule is found by adding each of the individual bond dipoles
What has to happen to a molecule so it is overall polar?
1.The molecule MUST contain one or more polar bonds.
2.The molecule must NOT be completely symmetrical
What is Dipole-Dipole?
are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule

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