Empirical formula
This presentation is the property of its rightful owner.
Sponsored Links
1 / 11

Empirical Formula PowerPoint PPT Presentation


  • 104 Views
  • Uploaded on
  • Presentation posted in: General

Due Today: 1. Empirical Formula Pre-Lab 2. Density Short Report Homework: 1. Empirical Formula Formal Lab Report. Empirical Formula. Objective. Experimentally determine the empirical formula of: Zinc and chloride reaction Copper and sulfur reaction . Procedure Notes.

Download Presentation

Empirical Formula

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Empirical formula

Due Today:

1. Empirical Formula Pre-Lab

2. Density Short Report

Homework:

1. Empirical Formula Formal Lab Report

Empirical Formula


Objective

Objective

  • Experimentally determine the empirical formula of:

    • Zinc and chloride reaction

    • Copper and sulfur reaction


Procedure notes

Procedure Notes

  • Part I: Zinc Chloride

    • Procedure Change:

      • Use 0.2-0.25g of zinc

    • This MUST be done in the hood!

    • DO NOT touch the evaporating dish with your fingers!


Procedure notes1

Procedure Notes

  • HCl MUST be poured in the hood!

  • DO NOT have the bunsen burner on!

  • Heat water while you are waiting for the evaporating dish to cool and the reaction is proceeding


Procedure notes2

Procedure Notes

  • When heating, AVOID spattering

  • Make sure to get data from another lab group

  • Return evaporating dish to the oven


Procedure notes3

Procedure Notes

  • Part II: Copper Sulfide Compound

    • DO NOT touch the crucible and lid with bare hands!

    • When heating, a blue flame should be rising from inside the crucible


Procedure notes4

Procedure Notes

  • When the flame disappears, heat to red hot

  • Make sure to get data from another group

  • Return crucible and lid to the oven


Waste

Waste

  • Dispose of contents in an appropriate waste container


Risk assessment

Risk assessment

  • Hydrochloric Acid

    • Danger

    • Inhalation Hazard

    • Corrosive


Calculations

calculations

  • To calculate moles:

  • Mole Ratio:


Calculations1

calculations

  • Mole ratio:

    • Examples:

      • 1:2

      • 2:1

      • A ratio should never be reported as a single number


  • Login