Burets - Study guides, Class notes & Summaries

Analytical Balance - ANSWER-Used for accurate, quantitative measurements of mass Graduated Cylinders - ANSWER-Measure and dispense known volumes of liquids Volumetric Flask - ANSWER-Designed to contain a specific volume of liquid. Also used to make solutions with accurate concentrations Burets - ANSWER-Long, narrow tube with a stopcock at its base. Used for accurately dispensing variable volumes of liquids or solutions. Pipet - ANSWER-Designed to deliver a known volume of liquid. Dif...

What is the radius of an atom? - Ans .0.1 nanometers Where is the nucleus located? - Ans .center of the atom What does the nucleus contain? - Ans .protons and neutrons What charge does a proton have? - Ans .positive What charge does an electron have? - Ans .negative What is the mass of an electron? - Ans .0 what charge does an atom have? - Ans .no charge What does the atomic number tell you? - Ans .number of protons What does the mass number tell you? - Ans .Number of protons and neutron...

C125 MIDTERM REVISION EXAM QUESTIONS WITH CORRECT ANSWERS A student experimentally determined the mass % compisition of Ca in CaCO3 to be 38.9%. What is the real mass % composition of CaCO3? What is the % error? - Answer- real = 40.04% error = 2.858% Recall the procedure (chemical measurements). How would the following source of errors affect calculated density of water? A balance was improperly calibrated and always weigh masses 1.0g less than the real masses - Answer- no effect (take...

True or False: If you are late to class, you can take the quiz after the lab is over - Correct Answer False List 4 pieces of PPE (personal protective equipment) that must always be worn in the lab - Correct Answer - Safety goggles - Lab coat - Long pants/skirts - No crop tops - Long hair tied up True or False: The volume of a mixture is always the same as the sum of the individual volumes - Correct Answer False Ex. When mixing 10mL of rubbing alcohol with 10mL of water, the total v...

Use as a container; like a cup May be heated - answer-Beaker Used to measure volume Cannot be heated - answer-Graduated cylinder Flasks that can be heated - answer-Erlenmeyer Flask Has many uses and can be heated - answer-Test tube Used to hold a test tube - answer-Test tube holder Used to collect and measure the volume of gases - answer-Gas Measuring tube Used to hold burets when titrating - answer-Double Buret Clamp Used to support the crucible - answer-Pipestem Triangle...

aqa gcse chemistry paper 1 What is the radius of an atom? - ANS 0.1 nanometers Where is the nucleus located? - ANS center of the atom What does the nucleus contain? - ANS protons and neutrons What charge does a proton have? - ANS positive What charge does an electron have? - ANS negative What is the mass of an electron? - ANS 0 what charge does an atom have? - ANS no charge What does the atomic number tell you? - ANS number of protons What does the...

experiment 1 - answer-basic lab techniques identification of substances by physical properties experiment 2 - answer-chromatography experiment 3 - answer-analysis of hydrated of hydrated salt experiment 4 - answer-heat of neutralization sig figs - answer--non zero digits are significant -any zeros between digits are significant -zeros to the left of the first non zero digit are not significant -if a number ends in zeros to the right of the decimal point, those zeros are significa...

Interpolation - Answer- estimating a value within the range of measured data extrapolation - Answer- projection; conjecture; V. extrapolate: infer (unknown information) from known information best fit line equation commonly takes y=mx+b format. What are your y, x, and b? - Answer- y = dependent variable (v) x = independent (n) m = slope (RT/P) b = intercept In assignment 2 (excel), students are asked to obtain the slope and intercept by rearranging the Ideal Gas Equation into y=mx+b ...

Laboratory Director (PhD, Pathologist (MD), etc.) - Oversees all laboratory operations (all three branches) - Expertise in medical, scientific, technical, and regulatory matters Pathologist (MD) - Works in the pathology department - Great resource/reference for MLS - Reviews all abnormal hematologic cases along with tissue biopsies, etc "Path Review" Laboratory Supervisor/Manager - Responsible for the technical aspects of the lab - Usually an MLS with additional education...