Lab Practical 1 Flashcards
(20 cards)
1
Q
Conversions:
- Kilo
- Centi
- Milli
- Micro
A
- Kilo = 1000m (thousands)
- Centi = 0.01m (hundredths)
- Milli = 0.001m (thousandths)
Micro = 0.000001m (millionths)
2
Q
Fahrenheit to Celsius
A
C = (F-32)/1.8
3
Q
Celsius to Fahrenheit
A
F = 1.8(C) + 32
4
Q
No heat (absolute zero)
A
Kelvin = 0 Celsius = -273 Fahrenheit = -459
5
Q
Water freezes
A
Kelvin = 273 Celsius = 0 Fahrenheit = 32
6
Q
Standard room temp
A
Kelvin = 293 Celsius = 20 Fahrenheit = 68
7
Q
Average body temp
A
Kelvin = 310 Celsius = 37 Fahrenheit = 98.6
8
Q
Water boils at
A
Kelvin = 373 Celsius = 100 Fahrenheit = 212
9
Q
Density formula
A
density (p) = mass (m) / volume (v)
10
Q
Compound Microscopes
A
- max magnification 1000x
- translucent/transparent objects
- lowest lens to highest
- 2D image
11
Q
Stereomicroscope
A
- opaque objects
- 3D image
12
Q
Total Magnification
A
- eyepiece = 10x
- objective lens (10, 40, 100)
- Total = 100x, 400x, 1000x
13
Q
Stereomicroscope four light positions
A
- Off
- Incident light only
- Transmitted light only
- Both transmitted and incident light
14
Q
Stereomicroscope magnification
A
- eyepieces (10x)
- lens (2x, 4x)
= 20x or 40x
15
Q
Benedict’s Test
A
- Benedict’s reagent -
normally bright blue - w/ sugars (glucose) and heated, turns green - yellow - orange - red
16
Q
Iodine Test
A
- normally amber/orange
- starch interacts - black or dark blue/black
17
Q
Biuret Test
A
- Biuret reagent - normally pale blue
- whole protein - purple
- protein fragments (peptides/polypeptides) - pink
18
Q
Silver Nitrate Test
A
- Silver Nitrate reagent - clear
- chloride ions react w/ silver ions to form white, cloudy precipitate of silver chloride
19
Q
Oils
A
- lipids are slippery feeling
- don’t dissolve in water (don’t evaporate either according to test)
20
Q
Amylase
A
Digestive enzyme produced by salivary glands in mouth and pancreas
- catalyst for hydrolysis of starch molecules into maltose
- breaks down starch very rapidly (fizzes/foams)
