Part A: Calibration Curve of FeSCN2+ Solutions Data Table A. Calibration Curve of FeSCN2+ Solutions Solution # Volume of 0.100 M Fe3+ (mL) Volume of 5.00x10-4 M SCN1- (mL) Volume of water (mL) Total Volume (mL) [FeSCN2+] (M) Absorbance at 477 nm Blank 1.0
Check all the boxes that properly complete the statement: The purpose of CH202 is to. reinforce the content of CH201 with hands-on experience. provide a lab grade the becomes a portion of the CH201 lecture course grade. introduce students to equipment for
Data Tables Note: All masses must be reported to three decimal places and all temperatures must be reported to one decimal place. Data Table A. Measuring the Freezing Point of Stearic Acid 20.866 Mass of 30 mL beaker Mass of 30 mL beaker plus stearic acid
Data Table A. Initial concentrations of HCl, H3PO4 and NaOH [HCl] 1.5 M [H3PO4] 1.0 M [NaOH] 1.5 M
1. Construct a reaction table for experiment #2, the addition of 20 mL each of HCl and NaOH and 10 mL of H2O. All entries should be in millimoles. You shoul
Data Table A. Absorbances of Standard Cu2+ Solutions Standard Cu2+ Solutions 1: 5.0 x 10-4 Cu(NO3)2 2: 1.0 x 10-3 Cu(NO3)2 3: 5.0 x 10-3 Cu(NO3)2 4: 1.0 x 10-2 Cu(NO3)2 Absorbance at ~600 nm (enter to the 0.001) 0.043 0.060 0.152 0.233
y= Equation of Tren
Data Tables and In-Lab Questions Note: All masses must be reported to three decimal places and all temperatures must be reported to two decimal places. Any calculations involving the specific heat of water (4.18 J/g-C) should be reported to three signific
This question will involve error analysis. In the following table, enter the values called for from your experimental results. Then calculate the percent error for the differences between the values you obtained for the solution of unknown concentration i
Data Table A. Calculated and Measured pH's of Acid and Base Mixtures Reaction # Reagents 10 mL H2O + 5 mL NaOH 1 + additional 5 mL NaOH + additional 5 mL NaOH 10 mL HCl + 5 mL NaOH 2 + additional 5 mL NaOH + additional 5 mL NaOH 10mL NH4Cl + 5 mL NaOH 3 +
Please make sure to visit the NCSU class evaluation site at Class Evaluation and fill out the questionnaires posted there. The site will be open during the start of dead week, if not before. If you need help, please send a message to [email protected] I
During your In Lab assignment, you prepared a reaction table for Solution #1B. Now you will make similar reaction tables for Solutions #2B - #5B. 1. From your Data Table B, enter the equilibrium concentrations of FeSCN2+ you calculated for each of the fol
These items concern safety in the Equilibrium Constant Experiment. Select all appropriate responses to each question. a. Which of the following are hazardous properties of nitric acid? It's an oxidant. It's corrosive. It's highly flammable. It's a potent
In Part A of the experiment, you tested the assumption that the contents of the styrofoam cup were isolated from the rest of universe. a. Which of the following would indicate that the Styrofoam cup is able to isolate the reaction mixture from the rest of
How many grams (to the nearest 0.1 g) of Fe(NO3)39H2O are required to prepare 250.0 mL of a 0.221 M solution of Fe(NO3)39H2O? 22.3
What is the molarity (to three decimal places) of the resulting solution when 20.889 grams of Mn(ClO4)26H2O are added to 550
This question addresses safety issues in the Kinetics experiment. Select the correct response in each blank. The only hazardous chemical listed in this chemical is sodium persulfate oxidizing agent , which can supply its own oxygen and react violently . I
These items concern safety issues in the Buffers lab. Choose all correct responses for each question. a. Which hazards are associated with chemicals used in these experiments? All are corrosive. Some are explosive. Some are flammable. All are explosive. S
During the lab, we assumed that the complexation reaction between Cu2+ and NH3 went to completion. Let's check that assumption. Assuming that you used 5.00 mL of 0.010 M Cu(NO3)2 and 1.00 mL of 3.0 M NH3 AND that the reaction goes to completion, please co
These items concern safety in the Solubility Product Constant Experiment. Select all appropriate responses to each question. a. Which of the following are hazardous properties of copper nitrate, Cu(NO3)2? It's an oxidizer. It's a potent carcinogen (causes
The following addresses safety in the titration curves lab. Put the letter(s) of the chemicals associated with each hazard in the box next to the hazard. If more than one hazard applies, put both letters in the box, in alphabetical order, separated by com
Name: C1385: Date: ID: A
. Xam Key Term Review Matching #1
a. precision g. physical change
b. accuracy 11. homogeneous mixture
0. SI system i. heterogeneous mixture
(1. English system j. element
- e. Metric system k. compound
f. signicant gures
Final Exam Skills Review Worksheet "
Types of Reaction and Balancing Equations _
Balance the following equations and indicate the type of reaction taking place:
Choose from single replacement, double replacement, synthesis, combustion, or
Creating Solutions of Standard Molarity
Oct. 07. 2013
Propose: To know how to create a certain solution of the molarity by means of the
Spec 20. Then, to count the absorbance, concentration and T% through the formular
Name: Class: I Date: ii): A
' Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
EmpirlCr-cl i3 ~l-l"\e
1. The molecular formula for aspirin is: C9H304. What is its empirical formula? 3: W
ATOC 3500/CHEM 3151 Problem 7 Answers
When a certain compound containing the cesium ion is heated, it gives off a colored flame.
Photons with an energy of 4.3 x 10-19 J are emitted. What wavelength and color is the cesium
Practice Examination 2
1. (10 points) Calculate the enthalpy change when 100.0 g of ice at 0.0 0C is heated to
liquid water at 50.0 0C. (specific heat of water is 4.184J/g & the heat of fusion is 333J/g).
Problem Set 7
Key begins on page 3.
1. Give the equation for each of the following important mathematical relations in this chapter:
a) The relationship between wavelength, frequency, and speed of light.
b) The relation between energy and frequen
Name: Class: Date: ID: A
Identiv the letter of the choice that best completes the statement or answers the question.
D 1. Do any of the atom diagrams below represent atoms of the same element (isotopes)?
ATOM A ATOM B ATOM C
A: Class: Date: ID: C
Identil the letter ofthe choice that best completes the statement or answers the question.
Q l. is a solution concentration described by the number of moles of solute dissolved in
each liter of solutio
Name: Class: Date:
Intro to Chemical Bonding and The Covalent Bond
Matching ( 1 pt ea)
Use the electronegativity table (provided with to the test) to determine which type of chemical bond forms
for the compound described below.
Freezing Point Depression
CH202 Lab 3
Goals: To measure the freezing point depression for a solution.
To calculate colligative molality and freezing point depression.
Safety: Stearic and lauric acid are non-hazardous. Prolonged contact
with stearic and la
AP Chemistry - Practice Test: Chapter 3
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Silver has two naturally occurring isotopes with the following isotopic masses: