Good Lab Practices
Sometime we analogize doing chemistry experiments to
cooking in the kitchen. However, working in a lab is more
dangerous than cooking in the kitchen. In order for you to enjoy
the fun working in a chemistry lab without hurting yourself
August 27, 2014
Lab section 029
Lab Experiment 1
1. You were hired to work for Thermoline Analytical Lab, Inc, as a laboratory technician.
Your supervisor asked you to prepare a 25 mL, 0.10 M sucrose solution and label it w
September 3, 2014
Experiment 2 Pre-Lab
The purpose of this lab experiment is to learn even more basic lab techniques,
including dilutions and calibration curves.
After I complete this lab I will be more cap
Chem Lab 123-044
Basic Statistics for Experimental Data and Design
From a manufactorys production line, there are two types of soda products: Apple and
Cherry flavors. Your job is to randomly select samples from the each product line and
monitor the quali
September 3, 2014
Lab Experiment 1
I was asked to prepare a 25 mL, .10 M sucrose solution and label it with the
compositions, formulas, molarity and density. My supervisor wanted to know how I
would accomplish my
Experiment 4 Pre-Lab
The purpose of this lab is to create an empirical formula for magnesium oxide
based on out experimental data.
Through combustion of magnesium ships, I will find the empirical fo
Experiment 5 Pre-Lab
The Purpose of this lab is to identify various chemicals by observing their reactions and comparing them to known reactions.
After combining a solution, I will be able to figure
Hypthesis: I hypothesis that the final heat of the reaction will be negative, because
hydrochloric acid is an acid an sodium hydroxide is a base meaning that they require little
energy to react with each other, s
M1= 0.02M ; V1= 100 mL
M2= 0.8M ; V2= x
Volume of the stock solution needed is 25 mL.*
*Also, included excess for draining pipette if using one.
I personally would do the calculations above,
Chem Lab 123
Stoichiometric Lab Report with Unknown Metal
Hypothesis: Knowing how to find the mass of magnesium oxide, I will mimic the same
procedure to find the mass of my unknown metal oxide.
If I do the calculations correctly, I will end up with a met
Course: Chem 123 Lab Section 004
Module: Basic Lab Techniques-Preparations of Solutions Journal #2
1. What might be the concern if you use a graduated cylinder to measure the stock
solution for dilution?
Answer: We use the pipette because it has a more ac
Final Lab Report
Lab Date: November 25, 12:00 pm- 3:00 pm
Lab Question: You are working for a research Laboratory as a senior technician. You are
given a task to determine the heat of reaction for the following reaction: MgCl2 +2 H2O
1. Clean thermometers over waste beaker and then switch cups, so cup 2 will go
inside cup 1. Also switch cups 3 and 4.
After I have recorded my data of the two temperatures, I will then move on to my second
reaction with the reactants MgCl and NaOH.
Question 3) You have measure 25 randomly selected Cherry samples from the production
line today. The mean and standard deviation were found to be 1.05 g/ml and 0.35 g/ml,
respectively. Estimate the 95% confident interval of the mean for the Cherry soda
September 17, 2014
Experiment 2 Post-Lab
I was asked to determine the sugar content of a popular drink. I did so by
measuring the mass of the solution and determining the density. I thought that after
He a lt h
Re a c t iv it y
P e rs o n a l
P ro t e c t io n
Material Safety Data Sheet
Section 1: Chemical Product and Company Identification
Product Name: Sucrose
14025 Smith Rd.
1. Title: Write the title of the experiment.
2. Name, Lab section, and Date.
3. Hypothesis: If required, give the hypothesis of this experiment for
which you will run the experiment to verify. Do not simply copy
sentences from the manual. U
First pat down metal in crucible with a wet glass rod. Then rinse rod with water, and add
about 4 drops of water to the crucible. Then place crucible on triangle above the Bunsen
burner to evaporate all water, removing the nitrogen in the process.
February 16, 2017
Chem 121 Section 035
Post Lab Experiment 1
Mass of 25mL flask
Mass of 25mL flask
Once the 25 mL volumetric flask was filled with the diluted sucrose and wa
Solution with given molarity
1. Calculate the mass of sucrose needed from the given molarity: .855 g
2. Use the mass scale to first weigh the volumetric flask, then collect the correct
amount of sucrose.
3. Use just enough solvent to dis
Basic Lab Techniques and Safety
Blue food dye
1.5 x 10^-3 M
1. I would use the Molarity given to calculate the mass of t
Purpose of the Experiment:
The purpose of this experiment was to learn the two ways of preparing a solution and to
begin familiarizing ourselves with using laboratory equipment.
To complete the first part of the experiment, I first measured the m
1. Using M1V1=M2V2 dilution equation, calculate the volume of stock solution needed to
create a solution with the molarity given.
2. Weigh volumetric flask to determine mass
3. Pour stick solution into flask.
4. Fill flask to the 25 mL line wit
Using the calculated molarities of multiple sugar solutions and the densities of those
solutions of those solutions to make a calibrated curve, it will be possible to determine the
molarities of unknown sugar solutions, and from there the suga