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Lab Math
Lab math in the histology lab
Question | Answer |
---|---|
Parts in 100 | Percentage |
Substance being dissolved | Solute |
The substance in which something is dissolved | Solvent |
Another way to write 10% | 1:10 1/10 10/100 |
What type of glass ware should be used for measuring solutions | Volumetric Glassware |
Percent solution equation | % desired:100=g or mL needed: volume desired |
Method of compensating for variances in the actual dye content of dry dyes used in the preparation of staining solutions | Gravimetric Factor |
Gravimetric Factor | Concentration of present dye/concentration of new dye=gravimetric factor |
A 1M solution | contains 1 gram molecular weight of a substance dissolved in enough water to give a final volume of 1 L. |
A 1N solution | 1 gram equivalent weight of solute per liter of solution |
Molecular weight divided by the number of dissociable or replaceable hydrogen ions | 1N solution |
Equation to determine the weight of a substance needed for molar solutions | weight in grams=MxVxFW M=desired Molarity V=desired Volume in Liters FW= Formula weight (molecular weight) including any water of hydration |
Equation to determine the weight of a substance needed for normal solutions | weight in grams= (NxVxFW)/ v N=desired Normality V=Desired volume in Liters FW= Formular weight (molecular weight) including any water of hydration v=positive valence, or number of dissociable or replaceable hydrogen ions |
deci | one-tenth part of |
milli | one-thousandth part of |
centi | one-hundreth part of |
micro | one-millionth part of (micron) |
nano | one-billionth part of |
kilo | one thousand times |
Measure of length | Meter |
Measure of volume | Liter |
Measure of weight | Gram |
1 Liter= | 1,000cc |
1 lb | 454 g |
1 m | 39.37 in |
1in | 2.54 cm |
1 qt | 0.95 L |
Normal body temp (Celsius) | 37 degrees Celsius |
Conversion of Fahrenheit to Celsius | degrees Celsius= ((degrees Fahrenheit-32)x5)/ 9 |
Conversion from Celsius to Fahrenheit | degrees Fahrenheit= ((degrees Celsius x9)/5)+32 |
Strongly alkaline solutions should not be store in | Glass |
Strongly alkaline solutions should be stored in | Polyethylene or polypropylene containers |