definitions
concentrate
A solution with a large amount of solute in the solvent
chocolate chip cookies are an example of what kind of mixture?
heterogeneous
Give an example of a homogeneous mixture
any mixture that you can't see the different substances (milk, toothpaste, solutions, salt water)
What is an alloy?
Metals which have been dissolved into other metals to form a metal solution.
The closest thing to a universal solvent is ________
water
Compound
Substance made up of two or more different elements combined chemically
explain why raisins both sink and rise in soda?
they sink because they are more dense; they rise because of the carbonation
* soda is a super saturated solution that is unstable
give an example of heterogeneous mixture
any mixture where you can see the different substances (chocolate chip cookie, milkshake, sand, dirt, salad dressing, cereal in milk, salad, etc.)
list 3 methods used to separate the components of mixtures which have been physically combined.
Sifting, magnetism, and chromatography
Water is a _______ molecule, which makes it able to attract both positively and negatively charged substances and dissolve them, but oil is _______, or neutral, and therefore it won’t dissolve in water.
polar; nonpolar
A mixture where larger particles are mixed into smaller particles, with the
larger particles are suspended throughout the mixture
Suspension
explain why to use soap when washing oil off your hands
Water doesn't dissolve oil. Soap is both nonpolar and polar so one side sticks to the surface of the water and the other side sticks to the oil.
give an example of a compound
sugar, water, clouds, carbon dioxide, baking soda, etc.
When a beam of light passes through a colloid, the Tyndall effect causes the beam of light to be easily seen
in the solution.
Describe the taste of the chocolate milk as a diluted solution and as a concentrate?
The diluted solution didn't have much taste, however the concentrate had a stronger (better) flavor.
Two or more substances that have been combined, with each substance keeping its original chemical identity the same
Mixture
Explain why most jewelry is made of alloys.
Precious metals are soft. Mixing it with other metals makes it stronger so it won't bend easily.
Give an example of a colloid
milk, fog, emulsions, gel, aerosol, foam
what is the difference between concentrate & a saturated solution?
a concentrate has a large amount of solute in the solvent; but it becomes saturated when no more solute can dissolve in the solvent
which one of the methods of separating mixtures would have been used in the gold rush?
Something being dissolved
Solute
Explain the lab where we separated fat globules in a colloid.
Putting heavy whipping cream in a jar, shaking the jar separeted the fat globules from the homogeneous mixture. The fat globules attached to other fat globules, creating butter.
give an example of an alloy
white gold, sterling silver, bronze, titanium, brass, steel
explain the process of chromatography
mixtures separate as they move across a certain material that attracts the components differently.
what does "chromatography" mean?
color writing (Greek)