post lab 6 Essay examples

Submitted By kenziesluder
Words: 556
Pages: 3
Open Document
McKenzie Sluder Section 125

Experiment 6
Purpose: To weigh duplicate samples, cool the solution at room temperature and then heat and boil the mixture to change the mixture into green, then yellow. Then calculate the molarity of HCL.
Introduction: Titration is used to determined for the molarity of an unknown substance. The process begins when you add a little addition of a solution that is called the second solution until the solute in the second unknown solution has reacted. The indicator is added in to the titration technique when we have finished titration. The indicator we used is phenolphthalein. This indicator should be used with a buret.
Procedure:
Standardization of 0.10M HCL
1. Weigh .15 grams of dried Na2CO3.
2. Dissolve sample in 100mL of distilled water, stir/heat if needed.
3. Add 5-6 drops of bromocresol green indicator until the solution turns blue.
3. Put HCL inside the buret and titrate the solution until a green color is reached (be careful to not over titrate it).
4.Once green color is reached, heat and broil the Co2. The color should return back to blue once this is completed.
5. Let it cool to room temperature, Once cooled, continue the titration of HCL until a yellow color is reached.
6. Calculate the molarity of the HCL.

Procedure:
Standardization 0.10M NahOH
1. Weigh 0.50 grams of dried standard potassium hydrogen phthalate (KHP). Dissolve into a sample of 100mL of distilled water.
2. Add 4-5 drops of phenolphthalein indicator. Titrate through a buret with NaOH until the solution turns a pink color.
3. Calculate the molarity of NaOH solution.

Repeat each standardization 3 times.

Results:
Standardization of HCL
Trial
HCL
Moles
Liters
Molarity
1
28.5mL
31.5
.031
.08
2
29mL
32
.032
.14
3
28mL
27.2
.027
.10
Average Molarity: .0931

Standardization of NaOH
Trial
NaOH
Moles
Liters
Molarity
1
31.5mL
.5
.031
5
2
29mL
20.5
.027
28.2
3
28.2mL
.076
.028
.0851
Average Molarity: .0808

Discussions and Questions:
During the procedure the first time we did the standization of the HCL, we accidently mixed the Na2CO3 into regular tap water. Once we
Show More

Related Documents: post lab 6 Essay examples

Psychology: Statistics and Post hoc Analyses Essay

College Psychology / Sociology 205L Data Analysis in the Behavioral Sciences Term: Fall 2006 Instructor: Marilyn Johnson-Kozlow, PhD Day/time: MW, 12:30-1:50PM Email: mfjohnson@palomar.edu Location: Lower Library-104 Units: 1 unit Lab Hours per Week: 3 hours Grading Basis: Grade/Credit/No Credit Co-requisite: Current enrollment in Psych/Soc 205 Scope of Course: Use the Statistical Package for the Social Sciences (SPSS) to analyze research data. Data analysis will include…

Words 709 - Pages 3

lab report Essay

CHM1032L pre/post lab instructions Preparation is a key to success in this lab. For this reason, you are required to thoroughly read through the experiment information presented in the lab manual, and complete a pre-lab for each experiment you do. The prelab must be completed prior to the day of the experiment. Each Friday I will ask to see your completed prelab before I allow you to enter the lab. If you have not finished the pre-lab, I will not allow you to enter the lab and you will receive…

Words 1046 - Pages 5

The Effect of Etomidate on Neuromuscular Junction Essay

periphery (Valadão et al., 2013). In this lab experiment, it was detected that Etomidate affects the human body as it has pre and post-synaptic action in neuromuscular junctions, it elicits synaptic vesicle exocytosis, and inhibits post-synaptic nicotinic receptors (Valadão et al., 2013). Etomidate has pre and post-synaptic actions at the neuromuscular junction level in humans (Valadão et al., 2013). In Diaphragm nerve muscles were separated and stained in lab mice for observations after the insertion…

Words 569 - Pages 3

Essay on Andrewww

nExperiment C: Kinetics of the Hydrolysis of T-butyl Chloride Post-Lab Ch202 Postlab Assignment Nov 5/2014 L10 Radwan Ahmed 130770850 1. What was green about this experiment was that the solvents used (acetone and water), and even the tert butyl chloride were fairly safe to handle with respect to the other chemicals used in the lab. This is why gloves were not worn, and one reason why this experiment follows GCP # 3 where chemical products should be designed to preserve efficacy of the function…

Words 305 - Pages 2

Essay about enemy within

Temperature with same volume of Enzyme. Wavelength : 415nm Temperature : 28c, 33c Volume of Enzyme : 0.5ml Time 0.5 ml enzyme/ Absorbance Time 0.5 ml Enzyme Absorbance @ 33C 0 0.065 0 0.068 2 0.077 2min 0.085 4 0.102 4min 0.098 6 0.115 6min 0.112 8 0.135 8min 0.136 10 0.151 10min 0.151 12 0.175 12min 0.189 17 0.203 14min 0.215 27 0.303 16min 0.250 37 0.418 18min 0.275 47 0.492 20min 0.350 57 0.572 22min 0.375 67 0.572 24min 0.428 26min…

Words 345 - Pages 2

Plant And Animal Cell Lab Report

objective of this lab was to learn what a microscope reveals about plant and animal cells. The completion of this lab should teach the participant the differences between plant and animal cells and how to examine samples of the covering tissues of a plant (the onion) and of an animal (the participant) using the epidermis and cells from a cheek swab of epithelial tissue. Materials 1. Packet Pages L14 to L16 2. Onion Chunks 3. Compound Microscope 4. Microscope Slides 5. Covers Slips 6. Water 7. Pipette…

Words 629 - Pages 3

Conservation Of Momentum And Angular Mo Essay

photo. 2. Place one puck in the middle of the air table. Practice collisions with spinning pucks! You will create and film three separate collisions. For each collision, the instructor or lab assistant will video-tape at least one collision for each lab group and store on a flash drive or hard drive so that your lab group will have access to it. 3. For the first collision, your goal is to have a spinning disk strike the stationary disk at a glancing angle. After the collision, the stationary disk should…

Words 699 - Pages 3

Dbm Tentative Syllabus Essay

MKTG5983 Tentative Class Schedule Please note that this is a tentative schedule. Some of the topics, assignments and exercises are likely to be changed due to the pace of discussion of the scheduled topics in each class/lab. Also, there may be some cases (mini and large) assigned for some of the weeks that are not shown in the schedule and will be announced via D2L or in-class. For each topic, I have also identified some of the readings that correspond to my video lectures. But, you can find pretty…

Words 2086 - Pages 9

Chem Post Lab 4 Essay

Experiment 4 Post-Lab Behavior of Gases Introduction In this lab we were looking at the different Gas laws. Boyle’s Law and Charles’s Law, Boyle looked at the temperature vs. pressure and Charles looked at volume vs. temperature. With Boyle’s Law my hypothesis was that the pressure would go up if the temperature went up because when water is heated the molecules expand making the pressure greater. Charles’s Law when the pressure went up the volume went down. Some of the problems with this lab is you…

Words 471 - Pages 2

Essay about Constructing a Logic Processor in VHDL that Executes Various Bit-Serial Logic Operands On 8-Bit Operands

Objective The objective of this experiment was to construct a logic processor in VHDL that executes various bit-serial logic operands on 8-bit operands. Lab notebook contains the code for a 4-bit processor. So, we can just modify it for 8-bits. Circuit Operation In lab 6 we did TTL circuit that is very similar to this circuit. If it was hardware in lab 6, in this we will use VHDL software to design it. The design of circuit is that it take s values are loaded from switches, then through routing unit…

Words 664 - Pages 3