Weight and volume conversions to moles
How many moles are in each of the following? a. 33 g of acetylferrocene b. 10 mL of acetone c. 5 mL of water (the molecular weight of water is 18) d. 25 mL of hydrochloric acid (conc.)
I need to make approximately 100 mls of each of the following solutions, and need to know how to dilute to do this: A. I have 30% hydrogen peroxide solution, and need to make up a 3% solution. B. I have a 0.1N NaOH solution, and want to make up a 0.01N solution. C. I have 85% Phosphoric Acid solution, and want to make a ...continues
Suppose that a 25-mL transfer pipet consistently delivers 25.031+/- 0.009mL when drained from the mark. Is this an example of random or systematic error? Comment.
What is an internal standard and why is it used during calibration?
What kind of temperature condition will favor the production of products in an exothermic reaction? Explain.
What is a buffer? Can you provide examples of buffers that operate in living creatures?
Suppose you are to titrate a weak base such as ammonia with a strong acid as HCl. What kind of indicator would you use and why?
High relative supersaturation is undesirable in a gravimetric precipitation. What measures can be taken to decrease the relative supersaturation during a precipitation?
What is the difference between the Volhard and the Fajan's methods of titration? Which is used for acid solutions? Why?
The standard potential for the reaction: Zn 2+ + 2e-
The standard potential for the reaction: Zn 2+ + 2e- = Zn is -0.763V. Based on this information, is Zn is a good or poor reducing agent? Explain.
