Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BioChem1100.tri-c
Lab Exam
| Question | Answer |
|---|---|
| Length (metric) | meter (m) |
| mass (weigh) | gram (g) |
| volume | liter (L) |
| Termperature | Celsius (C) |
| Time | second (s) |
| meniscus | Lowest portion of curve of water |
| pipette | (blank) |
| syringe | (blank) |
| Absolute zero | 0 Kelvin or -273 degrees Celsius |
| calorie | (blank) |
| (d) deci | 10 neg1 or 1/10 - one tenth |
| (c) centi | 10neg2 or 1/100 - one hundredth |
| (m) milli | 10neg3 or 1/1000 one thousandth |
| (u) symbol micro | 10 neg6 or 1/1,000,000 one millionth |
| (da) deka | 10 ten |
| (h) hecto | 10 power2 or 100 one hundred |
| (k) kilo | 10 power3 or 1,000 thousand |
| (M) mega | 10power6 or 1,000,000 million |
| cc | cubic centimeters volume measure |
| what is relationship between mL and cc? | Same |
| Density | The replacement between an objects MASS and its VOLUME |
| displacement | A method for measuring the VOLUME of an irregularly shaped object- immerse in a known quantity of water. Change in water is VOLUME of object |
| Energy | The ability to do work |
| Calorie | Unit of heat energy |
| Calorie - how does it work? | Amount of heat energy required to raise 1 gram of water from 14.5 C to 15.5 C |
| Celsius - freezing | 0 or zero degrees C |
| density | measure of MASS RELATING to VOLUME or SIZE of object |
| density (formula) | Density = Mass (M)/Volume (V) |
| Density of water-how to determine? | Record volume (Ex. 30 mL) then weigh (first weigh beaker, then TARE) , record mass - divide mass (grams) by volume (mL) |
| Actual density of water | 1g/mL at 4 degrees C |
| Erlenmayer flask | Flask with wide bottom (cylindrical pyramid shape) |
| What is relationship between milliliter & cubic centimeter? | They are the same |
| Fahrenheit - boiling point water | 212 degrees F |
| Fahrenheit - freezing point of water | 32 degrees F |
| Specific heat | AMount of heat it takes to raise the temperature of 1 gram of a substance 1 degree Celsius |
| The higher the specific heat... | the more heat energy it take to heat a substance |
| Why is copper good for pots? | Its specific heat is low, therefore it raises temperature easily |
| Gas turns to liquid (ex. water vapor) | Condensation |
| Vapor | Gas state |
| Weight | Strictly defined-the pull of gravity on an objects mass (people weigh less on the moon) |
| Solution | A uniform mixture |
| Solvent | The substance present in greatest concentration in a solution. The dissolving substance Ex. water in salt water |
| Solute | Substance present in smaller concentration in a solution Ex. salt in salt water |
| Liquid changes to gas | Vaporisation |
| Exothermic | A reaction that gives off heat energy |
| Endothermic | A reaction that requires the input of heat energy |
| Isotonic | Used to describe solutions with similar solute and solvent concentrations |
| Heat of fusion | Energy required to melt exactly 1 g of a substance at its melting point |
| Water-heat of fusion | 80 cal are needed to melt 1 gram of ice |
| Heat of vaporisation | Energy required to vaporize 1 g of a substance at its boiling point |
| Water-heat of vaporisation | 540 calories - 1 g of steam gives of 540 calories when it condenses |
| endothermic-use of rock salt to make ice cream | Salt takes energy from water to dissolve-to break the ionic bond, thus making the water COLDER when the salt is there |
| Mole | 6.02 x 10-23rd power |
| Law of Conservation of Matter | Matter cannot be created or destroyed in a chemical reaction |
| combination reaction Ex. | burn magnesium - produces light-reacts w/Oxygen to become magnesium oxide |
| Single replacement reaction Ex. | magnesium ribbon into test tube of HCI - hydrochloric acid - dissolves to become MgO (Hydrogen is given off as gas) this is EXOTHERMIC - gives off heat |
| Double replacement reaction Ex. | Epsom salt Magnesium Slfat MgSO4 crystals with sodium hydroxide |
| Boyle's Law | INVERSE relationship between P(pressure) and V (volume) for gases - as Pressure increases, volume decreases |
| Boy-cott's Law | Pressure decreased "volume" |
| Charles Law | DIRECT relationship between temperature and volume-as temperature increases in a gas, so does volume |
| Record gas temperatures | in KELVIN |
| Boyle's law Ex | Marshmallow in syringe-expanded as pressure is decreased when plunger is pulled back |
| inhale...volume increases therefore | pressure is decreased (boyle's law) and more air rushes in to fill the space |
| breath out--volume of lung decreases...t | therefore air goes out as pressure increases |
| Colloids | homogenous mixtures of larger particles dispersed in a dispersing medium-TYNDALL EFFECT |
| Colloid - Ex. | Starch in water-will go through filter, but water is cloudy |
| Tyndall effect | Colloids-large particles reflect light in a solution |
| Tyndall Effect Ex. | Polluted air reflecting light at sunset |
| Colloid (human) | Blood |
| Suspension | Sand in water-won't filter-forms particles |
| Solution | A uniform mixture-ex. salt water |
| Polarity-how does it affect solutions? | "like dissolves like" - nonpolar solvents will dissolve non polar solvents (ex. sugar dissolves in water, but not in oil) |
| Water is polar? | Universal solvent-will dissolve ionic compounds |
| Diffusion | Tendency of things to move from areas of greater concentration to areas of lesser concentration |
| Tonicity | comparison of realtive solute concerntration of two solutions |
| HYPERtonic | solute with greater concernation is HYPERTONIC |
| HYPO tonic | Solute with lower concentration |
| ISO tonic | when two solutions have same solute concentration they are isotonic |
| Physiological solutions | Isotonic with blood plasma - same osmotic pressure as cells and would be isotonic with cells |
| Osmosis | Movement of water across a semi-permeable membrane |
| Dialysis | Movement of substances OTHER than water across or through a membrane |
| What are units of specific gravity? | None-units cancel--it is a comparison of substance to density of water |
| Ex. of specific gravity | Urine - measured - carries wastes, so has higher density than just water |
| Diffusion | Ex ammonia on paper (phenolphtalein) turns pink when put in contact with ammonia--even gas will cause it to change color |
| 5% Dextrose in water | Physiological solution-Isotonic/same osmotic pressure as cells-may be used intravenously |
| 0.9% saline (NaCl) | Isotonic--physiologic solution- ok to use intravenously |
| Distilled water is ... | HYPO tonic to everything |
| Elodia in distilled water | Distilled water is HYPO compared to "hyper" cells-so water flows IN |
| Elodia in salt water | Water flows OUT of Elodea(shrinks) to increase water in the salt solution |
| Hemolysis | REd blood cells - if placed in water (HYPO compared to the blood cell), then water will flow in by osmosis, swelling the red blood cell & causing it to burst |
| Crenation | If placed in 10% salt (HYPER compared to water) then water flows out of the cell & it shrinks. Like PICKLES, which shrivel & lose water to the salt/pickling solution |
| Dialysis - iodine/starch | starch is in bag--iodine crosses membrane & is absorbed by starch (which is a colloid & can't get through membrane) |
| Renal function - | remove excess water, cellular waste |
| Hemodialysis | Blood flows in-bathed in dilysis solution-waster products flow through membranes |
| Specifi gravity of water | 1.000 g/mL |
| Specific gravity of urine - range | 1.003 to 1.030 g/mL |
Created by:
walterina4327