Lab-solutely
Name a lab we did this semester.
Help Me, I’m Melting, Suck it UP, It’s Getting Hot in Herre
What is a substance that conducts heat well, is hard, and is malleable?
metal
According to le Chatelier’s principle, an increase in the concentration of a reactant will cause a reaction to...
consume the added reactant
If the decomposition of 1.00 mole of sodium hydroxide (molar mass of 40.0g/mol) absorbs 60.0 kJ of energy, how much energy would be absorbed by the decomposition of 20.0 g of the substance?
30.0kJ
anything that has been used, left, removed, altered, or contaminated during the commission of a crime.
evidence
What is the density of water?
1 g/mL
What type of bond that forms from the transfer of electrons?
ionic
In the equation H2(g) + Cl2(g) >>> 2HCl (g), the reaction rate could be define as ___
the rate that H2 disappeared.
List one thing that determines the temperature increase in a substance.
specific heat of the substance and mass of the substance
study of criminal activity
criminology
What color is Cu(NO3)2 (aq)?
blue
Give a general property of covalent compounds.
low melting point
The rate of a reaction between A and B is expressed as rate = k [A][B]. To produce the greatest increase in reaction rate ___
double [A] and [B]
List one assumption(s) must be made when using a calorimeter.
no heat is gained or lost to the surroundings, the calorimeter itself does not gain or lose heat, all of the heat lost by the metal is gained by the water
“to see with one's own eyes”
autopsy
Which labs should you wear goggles for?
heating glassware, mixing chemicals
Give an example of a pair of atoms that will form a covalent bond.
N, O
Name a factor that does affect the speed of a chemical reaction?
temperature, nature of the reactants, concentration NOT size of the beaker
A 21.5g piece of iron at 10.0°C was dropped into a calorimeter with 132 g of water at 20.0°C. What is the final temperature of the system?
a. 3.2°C b. 21.4°C c. 85.4°C d. 102°C
b. 21.4°C
study of poisons and drugs
toxicology
Give an example of a “source of error” for a typical chemistry lab.
measuring the mass of a beaker--- NOT math mistakes or human error
Which metallic property is explained by the interaction of delocalized electrons with light?
luster
Give an example of a biological catalyst
enzyme
A scoop of ice cream has an energy value of 775,000 joules. What is this value in Calories? (Note 1 cal = 4.184 J and 100 cal = 1 Cal)
a. 775000 Cal b. 1852294 Cal c. 7750 Cal d. 185 Cal
185 Cal
material deposited at a crime scene that can only be detected through a deliberate processing procedure
trace evidence