Skip to main content

Chemistry Study Guide



If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com  



Practice calculating Activation Energy
The following table gives the variation of the rate constant with temperature for the first-order reaction:   2N2O5 (g) 2N2O4 + O2 (g).
T (K)
k (s-1)
273
9.89x103
298
2.20x105
318
6.58x106
338
3.98x107








Determine graphically the activation energy (Ea) for the reaction.


Practice with Half life

A solution that is 5.2x10-8 M in 32P is stored in a metal container for 100 days.

1. Plot the decay in the concentration of 32P as a function of time. The half life of
              32P is 14.3 days.

2. Plot ln[32P] as a function of time.

3. Show on both plots when the [32P] is 50%, 75% and 90% of its original value.

4. Show how you could use the plot of the natural log to obtain the rate constant
             and the half life of the radioisotope if you measured the concentration of the
             isotope as a function of time.



Practice determining half reactions
Write out the redox half reactions for the following:
  1. Sn (s) + Ag(NO3) (aq)         Sn(NO3)2 (aq) + Ag (s)
  1. Cu(SO4) (aq) + Zn (S)          Cu (s) + Zn(SO4) (aq)



Balance the following redox reactions:
  1. Cl- (aq) + Cr2O72- (aq)  →   Cl2 (g) + Cr3+ (aq)
  1. Fe3+ (aq) + Cr2O72- (aq)  →     Fe2+ (aq) + Cr2+ (aq)


Practice determining the rate Law

The reaction  2NO + O2  →   2NO2  is believed to occur by the following mechanism:

2NO     N2O2      FAST (rate constants k1 and k2)
N2O2 + O2  →  2NO                   SLOW ( rate constant, k2)

What is the rate law for this reaction? Use the steady state approximation.


Practicing Electrochemistry
Voltaic Cell (Galvanic or Electrochemical Cell)
A voltaic cell is assembled with Sn(s) and Sn(NO3)2 (aq) in one compartment and Ag(s) and AgNO3 (aq) in the other. An external wire connects the two electrodes and a salt bridge containing KNO3 connects the two solutions.
  1. In the product favored reaction, Ag+ is reduced to silver metal. Write out the balance net ionic equation for this reaction.
  1. Which half reaction occurs at the anode?
  1. Which half reaction occurs at the cathode?
  1. Write the balanced cell reaction and calculate the standard cell potential.
  1. Draw a diagram of the cell, indicating the direction of electron flow outside the cell and the direction of ion flow within the cell (across the salt bridge).


Practicing Electrochemistry Again

A battery can be made from aluminum metal and chlorine gas.
  1. Write a balanced equation for the reaction that would occur in a battery using the following half reactions:
Al3+ (aq)/ Al (s)
Cl2 (g)/ Cl- (aq)
  1. Which half reaction occurs at the anode and which occurs at the cathode?
  1. Calculate the standard potential (Eº cell) for the battery.
  1. Calculate Gº for this reaction.


Practicing Electroplating

How many grams of Iron metal are produced when a current of 10A is passed through a solution of Iron (III) Nitrate for 45 minutes?


If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com  


Popular posts from this blog

Setting The Stage For Learning About The Earth

If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   (These Answers Should Be Used as a Basis For Yours) Exercise 1.1 Submergence Rate Along the Maine Coast The rate of submergence is the total change in elevation of the pier 2 meters divided by the total amount of time involved 300 years and is therefore .67 cm/yr Exercise 1.4  Sources of Heat for Earth Processes A. The sand should be hot since the sun has been heating up the sand throughout the day. i. When you dig your feet into the sand you should feel cooler sand since the sun's penetration into the earth is limited. ii. This suggests that the Sun can only penetrate into the Earth up until a certain depth. iii.Based on this conclusion, one can assume that the Sun is not responsible for the Earth's internal heat since, we have heat hundreds of kilometers within the Earth and this can not be exp

The Romantics: John Keats and Samuel T. Coleridge

If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   PART OF THIS ESSAY HAS BEEN  OMITTED  FOR FULL ESSAY COMMENT,EMAIL, LIKE, FOLLOW US                                    The Romantics: John Keats and Samuel T. Coleridge         The Romantic Period in England had six major poets, William Wordsworth, Lord Byron, Percy Shelley, William Blake, John Keats, and Samuel Coleridge. For the purpose of this essay, the focus will only be on Keats and Coleridge. Although they were contemporaries, they each have very different styles of writing as is evident in their poetry. In “This Lime Tree Bower My Prison” an exemplary example of a conversation poem, the reader is able to see Coleridge’s thought process of how he realizes nature is everywhere around oneself, as long as all “facult[ies] of sense and…the heart [are] awake to Love and Beauty”.

O captain my captain and do not go gentle into that good night

If you have any test reviews, homeworks, guides, anything school related that you think can be posted on this website, reach out to me at makingschooleasier@gmail.com   In Walt Whitman’s “O Captain! My Captain!” and in Dylan Thomas’ “Do Not Go Gentle Into That Good Night”, the reader is presented with two venerable characters of different backgrounds; both which have deep admiration for the poem’s character. With the authors use of diction, figurative language and tone, the reader is able to see just how much some people have an effect on others and what their death brings upon the author and the reader’s mind. In Whitman’s poem, the reader is able to see the heavy use of metaphors throughout the poem.  Whitman’s entire poem is a metaphor. “Captain” is the metaphor for Abraham Lincoln, but on a first reading or without the footnote that is provided, this poem would be very ambiguous. The author’s tone throughout is very prideful and full of admiration towards the President. He