Chemistry & Society “Quest” UNIT 1 – Section B
Name:______
Matching: Select the best definition for each term and write the letter in the appropriate blank to the left.
______DensityA) positively charged atom
______AnionB) The dissolving agent
______ColloidC) The same throughout
______ReactantsD) Unequal sharing of electrons in a molecule
______PolarE) Two or more atoms bonded together
______SoluteF) Used to show a negative result for an experimental test
______MixtureG) Composed of two or more elements not physically separable
______CationH) Written on right side of chemical equation
______HomogeneousI) The dissolved substance
______HeterogeneousJ) Exhibit the Tyndall effect
______ProductK) Positively charged subatomic particles
______SolventL) Written on left side of chemical equation
______MoleculeM) Used to show a positive result for an experimental test
______ProtonsN) Tells the number of molecules
______ControlO) Different throughout
______CoefficientP) Simplest form of matter
______ElectronsQ) Negatively charged subatomic particle
______ElementsR) Two or more substances physically separable
______CompoundsS) Negatively charged atom
______Reference T) Ratio of mass to volume
Multiple Choice: Choose the best answer for the following questions
21. The metric unit for mass is the :
A) LiterB) Kilometer
C) GramD) Meter
22. The high surface tension of water can be best illustrated by which of the following :
A) rain forms beads on your carB) Water has a high boiling point
C) Water dissolves many thingsD) Water is present in all three physical phases
23. We can never get completely pure water because :
A) The government is cheapB) Dissolved gasses remain in all water
C) Water is already pureD) We must save chlorine for future use
24. The polar nature of the water molecule is caused by:
A) The atoms neutral chargeB) The attraction of oppositely charged ions
C) the unequal sharing of bonding electronsD) The other substances mixed in water
25. Suspensions, colloids, and solutions are all types of :
A) mixturesB) compounds
C) elementsD) pure substances
26. In a mixture of salt dissolved in water, the solute is :
A) the waterB) separated by filtering
C) the saltD) the precipitate
27. Which one of these would be classified as an element?
A) NaB) Na+
C) NaClD) More than one
28. Which one of these would be best classified as a compound?:
A) NaB) Na+
C) NaClD) More than one
29. Which one of these would be best classified as an ion?
A) NaB) Na+
C) NaClD) More than one
Short Answer:
30. A Cation is another name for a ______ion, and an Anion is another name for a ______ion.
31. The boiling point of water is ______C, and the freezing point of water is ______C.
32. In the “language” of chemistry, ______are like letters, ______are like words, and ______are like sentences.
- Pure water is ______, ______, and ______.
Essay/ Problems:
34. The density of water is 1.00 g/ml, the density of gasoline is 0.67 g/ ml, the density of aluminum is 2.70 g/ml, and the density of cork is 0.24 g/ml. Draw a beaker, and show where each substance would be located within the beaker according to it’s density.
35. Answer the following questions given the chemical reaction below showing the formation of ammonia (NH3) :
N2 + 3H2 2NH3
a) How many nitrogen atoms are there on the left side of the arrow?______
b) How many hydrogen atoms are there on the left side of the arrow?______
c) How many nitrogen atoms are on the right side of the arrow?______
d) How many hydrogen atoms on the right side of the arrow?______
e) How many nitrogen molecules on the left side of the arrow?______
f) How many hydrogen molecules on the left side of the arrow______
g) How many ammonia molecules are formed on the right side of the arrow?______
h) The small numbers written to the right of some atoms are called______
i) The large numbers written to the left of some molecules are called______
36. Provide two unusual properties of water, and describe their effect on life on this planet.