Which best describes a mixture?
It can have different compositions, and it has a set of characteristics that does change.
Eli states that sodium phosphate is a mixture because it is composed of both sodium ions and phosphate ions.
Which is the best analysis of Eli's statement?
It is incorrect because sodium phosphate is a compound that has a single composition.
Julie takes a cold glass of clear, colorless liquid out of the refrigerator and puts it on the table. As the liquid warms up to room temperature, Julie sees bubbles of gas form in the liquid and rise to the surface.
Which conclusion is best supported by Julie's observations?
The liquid is a mixture because it has a gas dissolved in a liquid.
Which property describes a mixture? Check all that apply.
It can be separated by physical methods.
It can appear different from different sources.
It cannot be described by a chemical symbol or formula.
A chemical reaction is the only way to separate a(n) _ .
pure Substance
Which describes a homogeneous mixture?
A solute dissolves in a solvent to make a solution.
Which is a property of every heterogeneous mixture?
The characteristics of the mixture change within a sample.
When mixed, which states of matter form only a homogeneous mixture?
two gases
Which is a property of every mixture?
One substance can be separated from another through physical means.
Dominic made the table below to organize his notes about mixtures. What mistake did Dominic make?
Although it is possible to have more than one state, it is also possible to have only one state.
The substance that gets broken down in a homogeneous mixture is the _ .
Solute
Which describe colloids? Check all that apply.
heterogeneous mixtures.
may have a uniform appearance,
are made up of at least two substances.
Hana fills a cup with sandy ocean water. She pours the mixture through a filter. What does she collect that passes through the filter?
a solution of salt in water
Which material is the least likely to be recognized as a mixture by looking at it under a microscope?
a homogeneous mixture
Maria examines a mixture that appears to be the same throughout. However, when she looks at a sample using a magnifying lens, she can see small droplets of liquid surrounded by another liquid.
Which conclusion best fits her observations?
The mixture is a colloid because two different substances can be seen in a small sample.
Otis watches a cooking show on making mayonnaise. The chef dissolves salt and sugar in vinegar. She mixes in an egg yolk, and then mixes in oil until the ingredients are completely blended together. The chef says that it's great on sandwiches and that it can be stored without separating.
Which best describes the purpose of the egg yolk in the recipe?
It acts to hold the vinegar and oil together in a colloid.
Which will settle out if allowed to sit on a table?
a suspension
Which lists mixtures, in order, from the smallest particles to the largest particles?
solution, colloid, suspension
What is the correct classification of a mixture in which both a solid and a liquid are visible?
a heterogeneous mixture and a suspension
Fog is a __{ composed of water droplets in air.
Colloid