Karteikarten
Chem Unit-1
Karten in diesem Stapel (30)
- 1Scientific Method1. The problem is precisely defined. (question + Problem)
2. Observations and Research.
3. Hypothesis (Your hypothesis must be measurable and should be constructed in a way that will help answer your initial question.
4. Conduct Experiment (test your hypothesis and remember to only change one factor at a time, while keeping all other conditions the same.
5. Conclusion (state whether hypothesis was true or false).
6. Communicate results. - 2Types Of Chemistry ANALYTICAL CHEMISTRYThe study of separation and identification or species of matter.
- 3Types Of Chemistry BIOCHEMISTRYThe study of chemical properties and process of living matter. (takes place with living organisms).
- 4Types Of Chemistry ORGANIC CHEMISTRY- The Study of carbon and its compounds.
- Study with organic compounds. - 5Types Of Chemistry INORGANIC CHEMISTRYThe study of chemicals that are other than organic (study of inorganic compounds).
- 6Scientific Notation- Decimal Form.
- With 0 to the left of decimal.
Ex. 125 000 = 1.25 x 10ˆ5
Ex. 0.000 565 = 5.65 x 10ˆ-4 - 7Precision Vs Accuracy-Precision (Repeatability)
-Precision measures the closeness of two or more measurements to each other.
-Accuracy (Truth)
-Accuracy refers to the closeness of a measurement to a known or standard (target) value. - 8SigFigs-All Non-zero's.
-Sandwiched Zero's.
-Final Zero's after the decimal point.
-All numbers in scientific notation.
Ex. 0.0006 = 1
230 = 2
59.050 = 5 - 9SigFig Multiplications and DivisionsAnswer should equal least amount of sigfigs in numbers.
Ex. 26.4 (3) x 120 (2) = 3168.000
Sigfig = 320 - 10SigFig Addition and SubtractionThe number of decimal places should be equal to the least number of decimal places.
Ex. 13 (1s) + 1.6 (10th) = 14.6
Sigfig = 15 because needs to be to the ones. - 11Graphs INTERPOLATIONAn estimation of a value within two known points.
- 12Graphs EXTRAPOLATIONAn estimation of a value based on extending a known sequence of values (graph) beyond the area that is certainly known.
- 13Matter PURE SUBSTANCEHOMOGENEOUS MATTER
- Are uniformly blended or ''The Same'' throughout.
-Substances that are not simply pure and not contaminated.
Ex. Water, Diamond, Gold - 14Matter MIXTURESHOMOGENEOUS OR HETEROGENEOUS MATTER
- A combination of 2 or more substances that can be put together, can be easily separated, but do not make a new substance.
Ex. Sand and Water - 15Matter SOLUTIONSHOMOGENEOUS MIXTURES
- A mixture of two or more substances that can not be easily separated and makes a new substance.
Ex. Sugar and water (Dissolving) - 16Matter MECHANICAL MIXTURESHETEROGENEOUS MIXTURES
Consists of two or more regions called phases that differ in properties.
Ex. Sulphur and lead mixed together with a string and different coloured marbles in a bag. - 17Heterogeneous MixturesAre made from different substances that remain physically separate.
Ex. Sand and Sugar = Grains can be distinguished. - 18Homogeneous MixturesHas a definite composition, and specific properties in a homogeneous mixture the different parts can be seen.
Ex. Salt Dissolved in water - 19Observations and interpretations of matter OBSERVATIONSObservation is taking down noticeable facts about the matter.
- 20Observations and interpretations of matter INTERPOLATIONInterpolation of matter is making a conclusion about matter based in the observations made.
- 21Observations and interpretations of matter QANTITIVE VS QUALITATIVEQualitative: Observations using facts like colours or state.
Quantitive: Observations using numbers. - 22Changes of State
- 23Heat vs TempatureHeat = A measure of total kinetic energy.
Temperature = The average kinetic energy of the molecules. - 24Physical ChangeObserved without changing the chemical makeup of the substance.
Ex. Crushing a Can
Melting an ice cube
Breaking Glass
Dissolving Salt in water
Miking green and Red marbles - 25Chemical ChangeAll Changes that produce a new kind of matter with different properties.
Ex. Rusting Iron
Baking a cake
Souring Milk
Burning wood - 26Aqueous SolutionsSolutions in which the solvent is water are defines as aqueous solutions. Aqueous solutions can contain many different solutes.
Ex. NACL (aq) salt water is an example.
AQ indicates that the solute is dissolved in water. - 27Liquids- Particles are healed together by weak attractive forces.
- Small spaces between particles (free to slide around).
- Liquid particles are also vibrating.
-When heated the particles translate and vibrate more rapidly, until they overcome the weak attractive forces holding them together and become a gas. - 28Solids- Lowest potential energy.
- particles are strongly attracted to one another (held rigid)
- Particles vibrate (vibrations is a form of kinetic energy)
- If a solid is heated, its particles begin to vibrate more strongly. Eventually most solids reach a point at which their particles overcome the strong attractive forces, and break free from their fixed positions to become a liquid. - 29Gases- The attractive forces acting between its particles are very small or non-existent.
- A gas is easily compressed indicating widely spaced particles.
-The particles vibrate and translate freely.
-Since energy has been provided to break the attractive forces of both the solid and the liquid phases, gasses have the highest potential energy of the three states of matter. - 30WHIMISWorkplace Hazardous Materials Information System.
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- Grade 11 Chemistry Karteikarten am Chem Unit-1, erstellt von Camie M.R am 28/03/2019.
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