What term is used to describe a solid substance formed in a chemical reaction as in the figure shown?
A precipitate is a solid substance that forms in a solution. The figure below shows some of the signs that a chemical reaction is happening. Some chemical reactions produce a precipitate.
What describes mixture with a uniform composition?
A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture.
When paper turns yellow brown upon exposure to sunlight What type of change is likely taking place?
Lignin eventually turns paper yellow because of oxidation. That is, the lignin molecules, when exposed to oxygen in the air, begin to change and become less stable.
What two liquids form a solid?
A precipitate is a solid which is formed when two liquids are combined and then react. It is a different substance to either of the reactants and does not dissolve in the reaction mixture.
What two liquids form a precipitate?
A precipitation reaction can occur when two solutions containing different salts are mixed, and a cation/anion pair in the resulting combined solution forms an insoluble salt; this salt then precipitates out of solution.
What contains two or more gaseous liquid or solid substances blended evenly throughout the mixture?
A homogeneous mixture contains 2 or more gaseous, liquid, or solid substances blended evenly throughout. Another name for a homogenous mixture is called a solution. A solution’s particles are so small that they cannot be seen with a microscope and will NEVER settle to the bottom of their container.
What type of mixture that has a uniform composition or appearance throughout?
homogeneous mixture
A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. Heterogeneous mixtures consists of visibly different substances or phases.
Is the yellowing of paper a chemical change?
A chemical change. When a newspaper turns yellow after sitting in sunlight, the newspaper undergoes what type of change? A physical change.
