General Chemistry 1 Lab Practical Detailed Questions And Quality Solutions
6 views 0 purchase
Course
CHEM106
Institution
CHEM106
Beaker - Correct Answer Glassware that measures volume in milliliters (mL).
Burette - Correct Answer Glassware that measures volume in milliliters (mL), numbers are in the opposite direction (0 at the top, 100 at the bottom), used for titration, read to the hundredths place.
Erlenmeyer Fl...
General Chemistry 1 Lab Practical Detailed
Questions And Quality Solutions
Beaker - Correct Answer Glassware that measures volume in milliliters (mL).
Burette - Correct Answer Glassware that measures volume in milliliters (mL), numbers
are in the opposite direction (0 at the top, 100 at the bottom), used for titration, read to
the hundredths place.
Erlenmeyer Flask - Correct Answer Glassware that is usually used for titration
collection due to its lack of spilling.
Volumetric Flask - Correct Answer Glassware that is calibrated to a specific volume,
usually used for dilutions.
Volumetric Pipette - Correct Answer Glassware that allows for precise measurements
of volume (up to 4 sig figs), used with a large bulb.
10% Rule - Correct Answer Determines how accurately we can read an instrument,
The uncertainty in the instrument is 10% of the smallest divisions.
e.g. Since 10% of 0.2 is 0.02, we should read this instrument to the nearest 0.02 mL
and report our answer as ± 0.02 mL.
Density - Correct Answer The amount of matter in a substance.
Percent Error - Correct Answer Determines the precision of calculations performed in
the experiment.
Chromatography Paper - Correct Answer A separation method which exploits
molecular structure . Some molecules will be more attracted to the surface than others
and therefor capillaries of the paper will push pigments upwards.
Filtration - Correct Answer A separation method that exploits phase state or particle
size. Often used to separate a solution of solids from liquids.
e.g. salt and sand mixture
Distillation - Correct Answer A separation method that exploits differences in boiling
point. When a mixture is heated, the lower boiling substance will boil off (become a
vapor) first leaving behind the higher boiling substance(s). The vapor must be
recondensed and allowed to collect in a separate container.
e.g. water, copper (II) sulfate and dirtB
Magnetism - Correct Answer A separation method in which components of a mixture
may be separated by using a magnet if one of the substances is attracted to the magnet
and the other is not.
e.g. iron filings from powdered sulfur
, Beer-Lambert's Law - Correct Answer Describes the relationship between absorbance,
pathlength, molar absorptivity and concentration
Colors Observed - Correct Answer The color of a substance depends on the
wavelength of light absorbed or reflected/transmitted
- When a substance absorbs all the wavelengths of visible light (380 nm-750 nm) it will
appear black
-opaque substances, when no visible light is absorbed (all wavelengths reflected) the
substance appears white
What stock solution was used in the 'Beer's Law' lab? - Correct Answer Allura Red
What should you use to clean off a cuvette before putting in a spectrometer? - Correct
Answer Kimwipe
What unit is energy(En) measured in? - Correct Answer Joules
Concentration - Correct Answer C1V1=C2V2
Percent Yield - Correct Answer
In the empirical formula lab what colors appear before and after the reflux apparatus? -
Correct Answer Begins as purple and turns orange
Single Replacement Reaction - Correct Answer AB + C ---> CB + A (C and A are
metals)
DE + F ---> DF + E (E and F are nonmetals)
e.g. calcium iodide + chlorine ---> calcium chloride + iodine
CaI2 + Cl2 ---> CaCl2 + I2
Double Replacement Reaction - Correct Answer AB + CD ---> CB + AD
e.g. silver nitrate + iron(III) chloride ---> silver chloride + iron(III) nitrate
3 AgNO3 + FeCl3 ---> 3 AgCl + Fe(NO3)3
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Victoria108. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
