Burets Study guides, Class notes & Summaries
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C125 MIDTERM REVISION EXAM QUESTIONS WITH CORRECT ANSWERS
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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...
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CH 102 Fall 2023 General Chemistry Lab Final Exam Questions with Correct Answers
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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...
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MLS 220: EXAM 1 2023 with 100% correct questions and answers
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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...
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Analytical Chemistry for Technicians
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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..................................................................................................
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CHEM C125 Midterm with Answers
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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...
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CHEM-C125 Final Exam
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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 ...
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CHEM 250: week 1 - summary from book
- Summary • 11 pages • 2023
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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.
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C125 Midterm Revision
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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 ...
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aqa gcse chemistry paper 1
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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...
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Lab Equipment, Apparatus List for Student Use ALL SOLUTION 100% CORRECT SPRING FALL-2022/2023 LATEST RAFED GRADE A+
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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 ...
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