Burets Study guides, Class notes & Summaries

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...

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...

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...

Analytical Chemistry for TechniciansChapter 1 Introduction to Analytical Science...............................................................................1 1.1 Analytical Science Defined ...............................................................................1 1.2 Classifications of Analysis.................................................................................2 1.3 The Sample..................................................................................................

What is the slope if A is plotted on y-axis and B is plotted on x-axis? 5A + 3B = 8 - Answer- -3/5 Masses (in g) and volumes (in mL) of different amount of an unknown liquid were plotted in Excel and a best-fit-line equation was obtained. What is the unit of the slope for the best-fit-line equation? - Answer- g/mL R square value - Answer- quantity that describes how good experimental data fits into a straight line How many significant figures should the result of the following calcul...

In Atomic Spectra lab, Vernier angles (V) in degrees of a Hg-lamp has a linear dependence on wavelength (λ) in nm of line spectra: V = 0.146 λ−10.85 a) Predict the Vernier angle in degree for a line that has a wavelength of 510 nm. b) If a student found a line at a Vernier angle of 76.5°, what is the wavelength in nm of this line? - Answer- a) 63.61 b) 598.288 Best-fit line equation commonly takes "y=mx+b" format. What are y, x, m and b? - Answer- y = y-value x= x-value m = slope ...

CHEM 250 chapters 2 - 3. Chap 2: covers tolerances of Class A instruments (burets, volumetric flasks, transfer pipets, and micropipets. how to use said instruments. Chap 3: covers significant figures. how to calculate with addition/adding, subtraction/subtracting, multiplication/multiplying, division/dividing, logarithm, anti logarithm. graphing with significant figures.

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 ...

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...

beaker - as a container, like a cup, may be heated, glass, mL Graduated Cylinder - to measure volume, mL, glass Erlenmeyer Flask - to be heated, glass Florence Flask - to be heated, glass test tube - many uses, can be heated, glass test tube holder - to hold a test tube, metal tongs - to pick up and hold apparatus, metal Double Buret Clamp - metal clamp with flexible clips, to hold burets when titrating gas measuring tube - used to collect and measure the volume of gas, glass, mL 10 cm ...