Cesium 2013

1/4 Day lang. Anyways, we still have reminders:



CHEM:
- Do 3.55 and 3.56 on a 1/2 crosswise:

3.55:

Hydrofluoric acid, HF(aq) cannot be stored in a glass bottle because compounds called silicates in the glass are attacked by the HF(aq). Sodium silicate (Na₂SiO₃), for example reacts as follows:
Na₂SiO₃(s) + 8HF(aq) --> H₂SiF₆(aq) + 2NaF(aq) + 3H₂O(l)

a) How many moles of HF are needed to react with 0.300 mol of Na₂SiO₃?
b) How many grams of NaF form when 0.500 mol of HF reacts with Na₂SiO₃?
c) How many grams of Na₂SiO₃ can react with 0.800 g of HF?

3.56:

The fermentation of glucose (C₆H₁₂O₆) produces ethyl alcohol(C₂H₅OH) and CO₂:
C₆H₁₂O₆(aq) --> 2C₂H₅OH(aq) + 2CO₂(g)

a) How many moles of CO₂ are produced when .400 mol of C₆H₁₂O₆ reacts in this fashion?
b) How many grams of C₆H₁₂O₆ are needed to form 7.50g of C₂H₅OH?
c) How many grams of CO₂ form when 7.50 g of C₂H₅OH are produced?


FIL:
- Essay due tomorrow due to not meeting Sir today.

ENG:
- Reporting of When Mr. Pirzada Came To Dine, followed by Incense in the Lab. Read those stories since you may not understand the discussion if you don't.

MATH:
- HW11 is due tomorrow now.
- Math LT moved to Monday.

Misc:
- Perios moved to August 2-4

* Comment if I missed/wronged anything.