1.3 MATTER CHANGES

Questions and Answers

forms of matter that have the same properties throughout

pure substances

have definite and unchanging chemical composition

pure substance

it is the same no matter where it is from

pure substance

two types of pure substances

elements and compound Signup and view all the answers

substances made up of only one type of atom

elements Signup and view all the answers

cannot be separated into simpler substances

elements Signup and view all the answers

they are made up of smaller particles but cannot be broken down by ordinary chemical means

elements Signup and view all the answers

examples of elements

metal, non-metal, metalloids Signup and view all the answers

substances made up of more than one type of atom

compound Signup and view all the answers

can be separated into simpler substances

compound Signup and view all the answers

they are chemically combined with definite and constant chemical composition

compound Signup and view all the answers

different from its composition

compound Signup and view all the answers

Produce H+

acid Signup and view all the answers

pH is less than 7

acid Signup and view all the answers

Turn blue litmus to red

acid Signup and view all the answers

Produce OH-

bases Signup and view all the answers

pH is greater than 7

bases Signup and view all the answers

Turn red litmus paper to blue

bases Signup and view all the answers

Produced when acid and base combine or during neutralization

salts Signup and view all the answers

Made up of ions

salts Signup and view all the answers

made up of two or more substances that are physically combined

mixture Signup and view all the answers

two types of mixture

homogeneous and heterogeneous Signup and view all the answers

made up of two or more substances that are physically combined

mixtures Signup and view all the answers

Two types of mixtures

homogeneous and heterogeneous Signup and view all the answers

have only one phase and its properties and composition are the same all throughout

homogeneous Signup and view all the answers

Composed of solute and solvent

solutions Signup and view all the answers

there is homogeneity or uniformity in phase

solutions Signup and view all the answers

have only two or more phases

heterogeneous Signup and view all the answers

mixtures with suspended particles

suspension Signup and view all the answers

different components are evident in t h e m i x t u r e

ssupension Signup and view all the answers

dense particles usually settle at the b o t t o m

suspension Signup and view all the answers

made up of tiny particles dispersed in a m e d i u m

colloids Signup and view all the answers

particles are so tiny that they are not affected by gravity

colloids Signup and view all the answers

they remain uniformly scattered all throughout the medium

colloids Signup and view all the answers

Matter changes that do not involve a transformation in the identity of is called

physical change Signup and view all the answers

There is No New Matter, this law states that states that matter can not be created or destroyed in a chemical reaction.

conservation of mass Signup and view all the answers

Study Notes

Pure Substances

Pure substances have consistent properties and a definite chemical composition, regardless of origin.
Two categories of pure substances include:
- Elements: Composed of only one type of atom and cannot be separated into simpler substances by ordinary chemical means.
- Compounds: Formed from two or more types of atoms that are chemically combined, can be separated into simpler substances, and have a constant chemical composition.

Acids and Bases

Acids:
- Produce H+ ions.
- Have a pH less than 7.
- Turn blue litmus paper red.
Bases:
- Produce OH- ions.
- Have a pH greater than 7.
- Turn red litmus paper blue.
Neutralization occurs when acids and bases combine, resulting in a compound.

Mixtures

Mixtures are combinations of two or more substances that are physically combined and can be categorized into two types:
- Homogeneous Mixtures: Have only one phase, uniform properties, and composition throughout, consisting of solute and solvent.
- Heterogeneous Mixtures: Contain two or more visible phases with distinct components; suspended particles may settle at the bottom.

Colloids and Suspensions

Colloids: Composed of tiny particles dispersed in a medium that remain uniformly scattered and are not influenced by gravity.
Suspensions: Contain larger particles that can settle over time, leading to a separation of phases.

Matter and Change

Physical changes in matter do not alter its identity.
According to the law of conservation of mass, matter cannot be created or destroyed during chemical reactions.

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1.3 MATTER CHANGES

Questions and Answers

forms of matter that have the same properties throughout

have definite and unchanging chemical composition

it is the same no matter where it is from

two types of pure substances

substances made up of only one type of atom

cannot be separated into simpler substances

they are made up of smaller particles but cannot be broken down by ordinary chemical means

examples of elements

substances made up of more than one type of atom

can be separated into simpler substances

they are chemically combined with definite and constant chemical composition

different from its composition

Produce H+

pH is less than 7

Turn blue litmus to red

Produce OH-

pH is greater than 7

Turn red litmus paper to blue

Produced when acid and base combine or during neutralization

Made up of ions

made up of two or more substances that are physically combined

two types of mixture

made up of two or more substances that are physically combined

Two types of mixtures

have only one phase and its properties and composition are the same all throughout

Composed of solute and solvent

there is homogeneity or uniformity in phase

have only two or more phases

mixtures with suspended particles

different components are evident in t h e m i x t u r e

dense particles usually settle at the b o t t o m

made up of tiny particles dispersed in a m e d i u m

particles are so tiny that they are not affected by gravity

they remain uniformly scattered all throughout the medium

Matter changes that do not involve a transformation in the identity of is called

There is No New Matter, this law states that states that matter can not be created or destroyed in a chemical reaction.

Study Notes

Pure Substances

Acids and Bases

Mixtures

Colloids and Suspensions

Matter and Change

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