Class Notes (839,394)
United States (325,937)
Chemistry (249)
CHEM 111 (69)
Lecture

Stoichiometry, aqueous ionic reactions, molecular equation, total ionic equation, net ionic equation

4 Pages
91 Views

Department
Chemistry
Course Code
CHEM 111
Professor
Dana Johnson

This preview shows page 1. Sign up to view the full 4 pages of the document.
Description
10 November Announcements Practice exam tonight A103, 7-9 pm CHEM 180 for next semester Experimental recitation for CHEM 113 Optional, not connected to lecture Only homework would be model-type assignments In-class, worksheet based class Refined model assignment Molecular-level interaction Due Wed, 11 / 17 2 Mg (s) + O (g) → 2 MgO (s) 2 How much MgO is formed if 30 g of Mg reacts completely? 1.2 mol MgO x (2431 + 16) g / 1 mol MgO = 50 g MgO At STP, how many liters of O a2e needed to completely react those 30. g of Mg? 30 g Mg x 1 mol Mg / 24.31 g x 1 mol O / 2 2ol Mg x 22.4 L / 1 mol O 2 14 L of O2 Stoichiometry The study of the quantitative aspects of chemical formulas and reactions The coefficients of a formula give the stoichiometric ratios of compounds in a reaction Solution example Given the following equation: NaOH (s) + HCl (aq) → NaCl (aq) + H O (l2 How many liters of a 10.0 M solution of HCl would react with 5.00 g of solid NaOH? 5 g NaOH → L HCl sln 5 g NaOH x (1 mol NaOH / 40 g NaOH) x (1 mol HCl / 1 mol NaOH) x (1 L HCl / 10 moles HCl) = 0.0125 L 12.5 mL A group of students determines the ion crowdness index of a 15.0 L solution to be 6.00 moles of ions per liter of solution. If 25.0 liters of water are added to the solution, what is the ion crowdness index of the new solution? A. 0.15 moles of ions / liter of solution B. 2.25 moles of ions / liter of solution C. 3.60 moles of ions / liter of solution D. 6.00 mole
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit