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Science 6 Chapter 7

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solute
A solution has the same properties throughout. It contains **** particles that are too small to see.
colloid
A **** contains larger particles than a solution. The particles are still to small to be seen easily but are large enough to scatter a light beam.
suspension
Unlike a solution, a **** does not have the same properties throughout. It contains visible particles that are larger than the particles in solutions or colloids.
solvent
When a solution forms, particles of the solute leave each other and become surrounded by particles of the ********.
lower
Solutes **** the freezing point and raise the boiling point of a solvent.
concentration
To measure *****, you compare the amount of solute to the amount of solvent or to the total amount of solution.
characteristic
Solubility can be used to help identify a substance because it is a ********* property of matter.
acid
An *** is a substance that tastes sour, reacts with metals and carbonates, and turns blue litmus paper red.
base
A *** is a substance that tastes bitter, feels slippery, and turns red litmus paper blue.
industry.
Acids and bases have many uses around the home and in *****.
hydrogen
An acid is any substance that produces **** ions in water.
hydroxide
A base is any substance that produces ********* ions in water.
pH
A low *** tells you that the concentration of the hydrogen ions is high. In contrast a high ***** tells you that the concentration of hydrogen ions is low.
neutralization
In a ***** reaction, an acid reacts with a base to produce a salt and water.
energy
Foods must be broken down into simpler substances that your body can use for raw materials and ****.
neutral
Some digestive enzymes work at a low pH. For others, the pH must be high or ******.
hydrochloric acid
****** has a pH of zero
water
**** has a pH of seven
drain cleaner
has a pH of 14
indicator
a compound that changes color when it contacts an acid or a base
mechanical
the physical part of digestion is called
unsaturated
a solution in which more solute may be dissolved at a given temperature
litmus
paper used as an indicator