Discussion: Information that relates to chemistry
Discussion: Information that relates to chemistry
Thank you for your work helping me to prepare for the conference, it went great. Since I have been back, I have been working on a post for the school’s Facebook page. Herzing has asked us to share an interesting piece of information that relates to chemistry. So, I’ve decided to write a post about acids and bases.
– Dr. Ima
Name:
Date:
This week in your chemistry class, you have been introduced to the process of titration. Remember that titration is the process used to determine the unknown concentration of a solution by using the known concentration of another solution. This process uses a buret to measure the volume of titrant that is added to the analyte. Below is a set of measurements that I would like you to solve:
How to read a buret:
Suppose you titrated a sample of NaOH with 0.150 M of HCl. Your starting volume on the burette is 0.00 mL. This is your final reading. How much NaOH was dispensed from the buret?
Answer:
Suppose you titrated a sample of NaOH with 0.150 M of HCl. Your starting volume on the burette is 0.00 mL. This is your final reading. How much NaOH was dispensed from the buret?
Answer:
Well done!
Now we need to solve for an unknown.
For your review, I have included a link to a video for you to review titration and how to solve for an unknown. https://www.youtube.com/watch?v=d1XTOsnNlgg
Using the information I’ve provided, calculate the molarity of the HCl concentration using the information provided.
Here’s the reaction:
HCl + NaOH —-> H2O + NaCl
Volume of HCl: 20.0 mL
Concentration of HCl: UNKNOWN
Know concentration of NaOH: 0.100 M
Titrate end point or total of NaOH volume dispensed: 48.6mL
Answer:
From the above information, would you put the HCl solution in the buret or in the Erlenmeyer flask in this titration reaction?
Answer:
Would you add the indicator, in this case we would use Phenolphthalein, to the HCl or NaOH?
Answer:
Calculate the molarity of the HCl concentration using the information provided.
Here is the reaction:
HCl + NaOH —-> H2O + NaCl
Volume of HCl: 10.0 mL
Concentration of HCl: UNKNOWN
Concentration of NaOH: 0.100 M
Volume of NaOH dispensed to reach endpoint 12.00 mL
Answer:
If you walk into any kitchen, bathroom, laundry room or pantry, you are bound to find numerous types of acids and bases.
Using the information provided in the chart below, completely fill in the missing pieces of information.
You must proofread your paper. But do not strictly rely on your computer’s spell-checker and grammar-checker; failure to do so indicates a lack of effort on your part and you can expect your grade to suffer accordingly. Papers with numerous misspelled words and grammatical mistakes will be penalized. Read over your paper – in silence and then aloud – before handing it in and make corrections as necessary. Often it is advantageous to have a friend proofread your paper for obvious errors. Handwritten corrections are preferable to uncorrected mistakes.
Use a standard 10 to 12 point (10 to 12 characters per inch) typeface. Smaller or compressed type and papers with small margins or single-spacing are hard to read. It is better to let your essay run over the recommended number of pages than to try to compress it into fewer pages.
Likewise, large type, large margins, large indentations, triple-spacing, increased leading (space between lines), increased kerning (space between letters), and any other such attempts at “padding” to increase the length of a paper are unacceptable, wasteful of trees, and will not fool your professor.
The paper must be neatly formatted, double-spaced with a one-inch margin on the top, bottom, and sides of each page. When submitting hard copy, be sure to use white paper and print out using dark ink. If it is hard to read your essay, it will also be hard to follow your argument.