Name__________________________________________________ Date _______________________
 
University of Hartford
CHEM 114
TAKE-HOME FINAL
Spring 2020
 

1. A UHART nursing student wanted to help a med student at another university over Spring Break. He told the med student that an aqueous solution of sodium bicarbonate (NaHCO₃) would help settle an uneasy stomach.  The med student would only try the remedy if it was made to a concentration of 3 M, her favorite number.  How many grams of sodium bicarbonate have to be added to 1L of water to reach this concentration? (15 points)

2. The size of an atomic radii decreases as it goes from ________________ to ______________ on the periodic chart. The electronegativity of an element increases from _______________to _____________ on the periodic chart.  The ionization energy of an element_______________ as it goes from top to bottom on the periodic chart. (10 points)

3. Identify the 5 types of reactions by labeling the pictures below with the correct reaction type. (15 points)

4. Calculate the mass of 15.0 L of NH₃ at 27° C(300K) and 900 mm Hg (1.18 atm) with a constant of 0821 liter·atm/mol·K and tell what gas law is governing this calculation. (15 points)

5. What three factors could shift the equilibrium of a system? (9 points)

6. Determine what is oxidized and what is reduced in each reaction. Identify the oxidizing or reducing agent. (10 points)
   1. Mg + 2HCl             MgCl₂ + H₂

1. Cl₂ +  2NaBr                    2NaCl   + Br₂

7. What are the possible types of emission in a nuclear reaction? Name the type(s) of emission in the nuclear reaction below? Indicate in the reaction below the indicators to identify the type of emission.  (16 points)

8. The atomic weight of Cu is 63.546 amu. There are two stable isotopes, ⁶³Cu and ⁶⁵  Determine what makes the atomic weights of these isotopes different and how many protons are in ⁶⁵Cu. (10 points)

9. The concentration of H₃O+ is known in a solution as 1.0 x 10-5 M, what is the pH of solution? (5 points)