Homework assignment Chapter 7
1. The atomic radius of main-group elements generally increases down a group because
A) effective nuclear charge increases down a group
B) effective nuclear charge decreases down a group
C) effective nuclear charge zigzags do
Calculating molarity can be fun and easy!
1. You know the mass of the primary standard (KHP) and.you know the molecular weight. So,
you can determine how many moles of KHP you have titrated:
wt KHPlgrams) / mol.wt. KHP (204.12) 2 moles KHP
2. You know the
Chem 211 - 03
Presentation Extra Credit.
The first presentation that I attended was about A Systematic Reassessment of The
Brown Vine Snake Using Phylogenetic Methods, by Beatriz Mendoza, Jason Block and Robert
C. Jadin. On their presentation, th
Prepare your buret as you did last week and fill it with the NaOH solution you
standardized in the previous lab ( carboy A or B ).
Titrate a sample (40-50mg) of pure citric acid, C6H8O7 mw = 192.14 (dissolve in deionized water 30-50ml) to the