Missed Questions on Chem SAT

Question 1

The slope of pressure vs temperature for a gas at constant voluem

Answer 1

Linear, directly related

Question 2

Family that contains elements in the colored gaseous state, in the liquid state, and with metallic properties

Answer 2

Halogens

• Fluorine/Chlorine
• Bromine
• Iodine

Question 3

I
-The structure of So3 is shown by using more than one structural formula

II
- SO3 is very unstable and resonates between these possible structures

Answer 3

TF- The sp hybrid bond can be at 1 of 3 locations, which results in 3 structures.

Question 4

I
-Li is the most active metal in the first group of the Periodic Table

II
Lithium has only one electron in the outer energy level

Answer 4

FT-Cs is, because it loses its outer electron easily

Question 5

In the electro lysis of water, the cathode reduction reaction is?

Answer 5

2H+ + 2e- -> H2 (g) because it only releases hydrogen gas.

Question 6

When sulfur dioxide is bubbled through water, the solution will contain

Answer 6

Sulfurous acid, because SO2 is the anhydride form of sulfurous acid.

Question 7

What is the approximate pH of a 0.005 M solution of H2SO4

Answer 7

-log [Hions_per_molec * concentration]

pH is -log[H+]. A 0.005 molar solution ionizes in a dilute solution to release two H+ ions per molecule. There fore the molar concentration of H+ ion is 2 * 0.0005 mol / L or 0.01 mol /L

Question 8

How many grams of NaOH are needed to make 100 grams of a 5% solution?

Answer 8

Percent is always by mass unless otherwise specified.

5 grams.

Question 9

For the Haber process: N2 + 3H2 2NH3, + heat (at equilibrium), which of the following statements concerning the reaction rate is/ are true?
I The reaction to the right will increase when the pressure ins increase.

II The reactions to the right will decrease when the temperature is increased.

III The reaction to the right will decrease when NH3 is removed from the chamber

Answer 9

Because this equation is exothermic, higher temperatures will decrease the reaction to the right and increase the reaction to the left, so II is true
Also I is true because with an increase of pressure the reaction will try to relieve that pressure by going in the direction that has the least volume: in this reaction,, to the right. Statement III is false because removing product in this reaction would increase the forward reaction. Statements I and II are true.