Consider the following reaction:
NaCl (aq) + Ag2SO4 (aq)
1a. What is the result of mixing the two aqueous solutions below?
A precipitate of Na2SO4 is formed.
A precipitate of AgCl is formed.
An acid-base reaction occurs.
1b. What is the IUPAC name of the first reactant NaCl? (3 points)
Sodium chloride
1c. What is the IUPAC name of the second reactant Ag2SO4? (3 points)
Silver sulfate
The oxidation number of F in HFO2 is -1.
Lithium metal reacts with water to generate hydrogen gas and a basic solution. When 0.070 mol of Li is added to 100.00 g of water, the temperature rises from 25.0 °C to 51.68 °C.
2a. How much heat was absorbed by the solution? The combined mass of the lithium and water is 100.49 grams, and the specific heat of the solution is the same as for water, 4.184 J/g°C.
(Answer in kilojoules)
2b. Calculate ΔH for the reaction shown below, for the reaction between lithium and water. Note that ALL of the lithium reacts; the water is excess. Please express your answer in kilojoules:
Li (s) + 2H2O (l) -> LiOH (aq) + H2 (g)
ΔH = ? kJ
Common polyatomic ion nitrite; NO2-
Note: Answer the following questions; you will want to consider the Lewis structure for nitrite. You do NOT have to show the Lewis structure in any of your responses, but you will want to have drawn it to answer the following:
3a. What is the electron group geometry for this ion? (3 points)
Trigonal planar
3b. What is the molecular geometry for this ion? (3 points)
Bent