Podcast
Questions and Answers
Which of the following is necessary when calculating measurements in chemistry?
Which of the following is necessary when calculating measurements in chemistry?
- Using non-standard measuring devices exclusively
- Using arbitrary units of measurement
- Applying significant figure rules (correct)
- Ignoring significant figures
Which method is most appropriate for separating a solid from a liquid in a mixture?
Which method is most appropriate for separating a solid from a liquid in a mixture?
- Distillation
- Filtration (correct)
- Chromatography
- Evaporation
What type of change occurs when ice melts into water?
What type of change occurs when ice melts into water?
- Endothermic change (correct)
- Chemical change
- Exothermic change
- Sublimation
If a substance readily ignites when exposed to flame, it is classified as what?
If a substance readily ignites when exposed to flame, it is classified as what?
Which of the following describes a homogeneous mixture?
Which of the following describes a homogeneous mixture?
What distinguishes a chemical change from a physical change?
What distinguishes a chemical change from a physical change?
Which of the following is an example of a chemical property?
Which of the following is an example of a chemical property?
Which technique would you use to separate a liquid from a solution based on different boiling points?
Which technique would you use to separate a liquid from a solution based on different boiling points?
Flashcards
Compound
Compound
A substance made of two or more elements chemically combined in a fixed ratio.
Physical Property
Physical Property
A characteristic that can be observed or measured without changing the substance's chemical composition.
Chemical Change
Chemical Change
A change that alters the chemical composition of a substance, forming new substances.
Endothermic Process
Endothermic Process
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Atom
Atom
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Exothermic Process
Exothermic Process
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Solution
Solution
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Concentration
Concentration
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Study Notes
Unit 1: Matter and Lab Safety
- Lab Skills: Students should be able to apply safety guidelines from the lab safety contract, describe safety protocols and reasons for their use, classify appropriate/inappropriate lab clothing and accessories, describe proper chemical handling and disposal procedures, and explain appropriate first aid responses.
Matter
- Classification of Matter: Matter can be classified as an element, compound, homogeneous mixture, or heterogeneous mixture.
- Properties: Properties can be physical, chemical, or both.
- Changes: Students should be able to compare and contrast physical and chemical changes, identify observations indicating a chemical change, and describe the differences between solid, liquid, and gaseous phases of matter.
Separation Techniques
- Processes: Students should identify whether the processes to separate materials are physical, chemical, or nuclear.
- Separation Methods: Students should use observations to identify unknowns, classify substances as soluble or insoluble, predict precipitate formation, and distinguish between flammable (hydrogen) and non-flammable (carbon dioxide) gases formed in reactions.
- Techniques: Separation methods include filtration, distillation, and other techniques.
Unit 2: Measurement
- Significant Figures: Students should identify the graduated and estimated place values on various measuring devices, compare standard and non-standard devices, and perform measurements of mass, volume, length, temperature, and pressure with the correct number of significant figures based on measuring instrument precision.
- Rules: Significant figure rules and the reason why some zeros are significant and others are not.
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