solution for hw 1 - Chem 211 Solutions to WebCT Homework...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chem 211 Solutions to WebCT Homework Chem 211 1. Stoichiometry. The following reaction is used to determine the amount of hypobromite, OBr- , in a 2.00 mL sample. What is the molarity of the solution if it consumes 1.76 milligrams of NH 3 (F.W. 17.03 g/mol)? 2 NH 3 + 3OBr- N 2 + 3Br- + 3 H 2 O M 078 . mL 00 . 2 1 OBr mmole 155 . OBr mmole 155 . NH mmole 2 OBr mmole 3 NH mmole 103 . NH mmole 103 . mg 03 . 17 mmole 1 NH mg 76 . 1 03 03 3 3 35 3 35 3 = = = Chem 211 Solutions to WebCT Homework 2. Propagation of errors. A solution of HCl can be standardized by reaction with pure sodium bicarbonate: 2H + + Na 2 CO 3 2Na + + H 2 O + CO 2 A volume of 29.94 0.09 mL of HCl was required for complete reaction with 0.9219 0.0005 g of Na 2 CO 3 (FW = 105.998 0.001). What will be the absolute uncertainty (i.e., overall standard deviation) in the molarity of the HCl?...
View Full Document

Page1 / 4

solution for hw 1 - Chem 211 Solutions to WebCT Homework...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online