Back to AI Flashcard MakerChemistry /Chemistry Lab Equipment and Procedures
What are some common pieces of lab equipment used in chemistry?
graduated cylinder, mortar and pestle, florence flask (circle), balance scale, dropper pipettes, funnel, crucible, erlenmeyer flask (triangle), bunsen burner, test tubes + holder, beaker + glass stirring rod, ring clamp and stand, thermometer
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Term
Definition
What are some common pieces of lab equipment used in chemistry?
graduated cylinder, mortar and pestle, florence flask (circle), balance scale, dropper pipettes, funnel, crucible, erlenmeyer flask (triangle), bunsen...
What parts should be included in a lab report?
title, objective(s), hypothesis, procedure, data, conclusion
title
include name, instructor, date, and name of lab
objective
what's the purpose of the lab (should be the question being tested)
hypothesis
include prediction statements for the lab, reflect predicted outcomes (if, then, because)
procedure
summarize the steps taken to complete the lab (include materials and list of steps) (list indepen., depen., and controlled variables)
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| Term | Definition |
|---|---|
What are some common pieces of lab equipment used in chemistry? | graduated cylinder, mortar and pestle, florence flask (circle), balance scale, dropper pipettes, funnel, crucible, erlenmeyer flask (triangle), bunsen burner, test tubes + holder, beaker + glass stirring rod, ring clamp and stand, thermometer |
What parts should be included in a lab report? | title, objective(s), hypothesis, procedure, data, conclusion |
title | include name, instructor, date, and name of lab |
objective | what's the purpose of the lab (should be the question being tested) |
hypothesis | include prediction statements for the lab, reflect predicted outcomes (if, then, because) |
procedure | summarize the steps taken to complete the lab (include materials and list of steps) (list indepen., depen., and controlled variables) |
data | data table and graphs |
conclusion | summary and interpretation of data results (use 'results [fail to] support') |
question | scientific investigation begins with a question |
research | with enough research a hypothesis can be made |
Hypothesis | w/ a testable hypothesis, you're able to conduct a trial&error process to gather data |
experiment | tests a hypothesis, describes materials and steps taken, explain necessary variables and keep accurate record of data, wrapped up in conclusion |
Why Do you need Detailed experimental procedures? | in order to accurately conduct an experiment |
Controlled Variables | factors that remain the same throughout the experiment |
independent variable | changes so that the experimenter can see the effect on other variables |
dependent variable | will change in response to test variable |
control group | an untested group, usually to spot differences in results |
When are measurements Accurate and Precise? | accuracy:(closeness of a measurement to the true value) precision:(refers to consistency of a set of measurements) |
How should measurements and calculations be reported to reflect uncertainty? | using significant figures |
List the rules for Sig figs. | all nonzero digits are significant, all 0s between nonzero digits are significant, 0s that come before any nonzero digits are not significant, 0s at the end of a # are only significant if there is a decimal, all digits in coefficient of a # in scientific notation must be significant |
We measure by Estimating one digit past the _____________ marking (or graduation) on an instrument. | smallest |
Significant Figures | a prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement (0.0345 - 0.0[3]<1st sig.fig.[4] 2nd [5] 3rd) |
List THE RULES for Sig Figs in Multiplication and Division? | answers should be rounded off to the same # of total sig. fig., if given 1 measurement, total # of sig. fig. = total # sig. fig. allowed in answer, only measurements made with specific instrument affect # sig. fig., conversion factors used to convert units do not change # of sig. fig. |
List the Rules for Sig Fig Rules in ADDITION AND Subtraction? | answer should be rounded off so final digit is in same place as leftmost estimated place, final answer can't have more places after decimal than any given measurements, final answer can't have final estimated digit farther to the right than any final digit in measurements used |
example multi./division sig. fig. | 72.0 cm 1m/100cm 1dam/10m = 0.072dam 72.0 has 3 sig. fig. and the answer has 2 final answer becomes 0.0720dam |
example add./sub. sig. fig. | 101.5g + 17.86g 17.86 final digit in 100ths place 101.5 final digit in 10ths place answers final digit must be same place as measurement with final digit in far left place (10ths) 101.5g + 17.86g = 119.36g>119.4g |