ipl-logo

Limiting Reactant Lab Report

1099 Words5 Pages

The purpose of this lab was to determine the molecular formula of the complex ion formed between iron (II) and phenanthroline through the use of spectroscopy and knowledge of limiting reactants. This lab is important as it can be used to discover molecular formulas of compounds as well as provide a representation of how limiting and excess reactants influence chemical reactions. To accomplish the main goal of this lab, we had to find a way to determine what the limiting reactant was and how we could use that knowledge to prove the ratio that allows for the most product to be made. The idea of limiting reactants says that the amount of product made cannot be greater than the amount of limiting reactant used, in terms of moles of each. By holding …show more content…

Then multiples of the number of moles of Fe+2 were chosen for the moles of phen in each solution. Since the solutions were made in a 50 mL volumetric flask we then used M = mol/volume again to figure out the molarity of each reactant in the solution. Finally, the solutions were also diluted again in a 1:10 using the formula M1V1 = M2V2, where the V2 was 10 mL so the absorbance values would be acceptable. This made sense as the solutions were an initially a deep red color and would thus need greater dilution to reach the appropriate absorbance values. We began testing with the 1:5 solution and that maximum absorbance value seen was beneath one, and because the lesser ratios would have less product, we knew that all of our solutions would fit in the range of .1 to 1 …show more content…

Hypothetically, there should be no absorbance value change as the molarity is same due to the amount of product being the same. This could be explained simply by human error during the experiment, most likely reusing pipets to fill the cuvettes before measuring or not mixing the solutions enough during dilution. This discrepancy in the results does not severely impact the experiment as the rate of increase from equivalence 1 to 3 is much greater than that of from equivalence 3 to 4. While these results are accurate and easily reproduced, one way to ensure consistency would be to retry the experiment starting with a different initial number of mols of

Show More
Related

6.03 Pre Lab

993 Words | 4 Pages

Marwah Alabbad Post lab 10/21/15 Question 1: 1. Experiment 1: Number of trails NaOH concentration (M) Volume of HCl solution (mL) Initial volume of NaOH(mL) final volume of NaOH(mL) The volume of NaOH to titrate HCl (mL) Concentration of HCl (M) 1st 0.1023 25.0 10.05 36.12 26.07 0.085 2nd 0.1023 25.0 5.74 31.40 25.66 0.105 3rd 0.1023 25.0 9.84 35.52 25.68 0.105 First trail calculation: 0.02607L× (0.1023mole NaOH/1L)×(1 mol of HCL/1 mol of NaOH)×(1/0.025)= 0.085M of HCl

Read More

Food Dyes Lab Report

2503 Words | 11 Pages

The results of this portion qualitatively are the original purple Powerade, and the recreated experimental solutions are near identical in color. Discussion: In (Table 1) and (Table 2), the importance of having the calibration curve is to be able to find the concentration of the original solution. For (Table 3), the importance of comparing both the original purple Powerade solution spectrum with the experimental solution spectrum is to be able to see if you recreated the original solution properly. In more detail in (Table 1) and (Table 2), the importance of figuring out the concentration is to be able to get the correct absorption and wavelength values when testing the solution in the spectrometer.

Read More

Limiting Reagent Lab

378 Words | 2 Pages

The limiting reagent in this lab was iron. Iron was the obvious limiting reactant because the 4.00 grams of iron was used to determine that 11.43 grams of copper sulfate would be necessary in the equation. Also, an extra 25% of copper sulfate was added to make sure there was enough copper sulfate in the reaction since it was the excess in the reaction. The theoretical yield of the reaction was 4.551 grams of copper. The theoretical yield is an amount predicted by stoichiometry and assumes that the limiting react is used completely; the yield was determined through stoichiometry by converting the amount of iron into the amount of copper in the reaction.

Read More

Stoichiometry And Chemical Reaction Lab Report

564 Words | 3 Pages

ADI Lab: Stoichiometry and Chemical Reactions The guiding question of this ADI lab was, “Which balanced equation best represents the thermal decomposition of sodium bicarbonate?” The goal of this lab was to use our knowledge of stoichiometry with the mole ratio to identify the correct chemical equation for the decomposition of sodium bicarbonate. Information that was given going into this investigation was the definition of the law of conservation of mass and the atomic theory which states that no atoms can be created nor destroyed during a chemical reaction. Also the mole ratio which is used to determine how much of a product will be produced in a chemical reaction using the given chemical equation.

Read More

Luminol Synthesis Lab

1079 Words | 5 Pages

Then for Solution B we diluted 4 mL of ‘stock solution B’ with 16 mL of water using a 50 mL beaker. The luminesce solution of the experiment, was obtain by diluting 3 mL of ‘solution A’ with 16 mL of water using a 150 mL beaker. Then in a dark room, we poured ‘solution

Read More

Mole Ratios Lab Report

560 Words | 3 Pages

Different Mole Ratios And It’s Reactions Introduction: Chemical reactions play an important role when it comes to mole ratios.

Read More

Spectronic 20 Lab Report

1411 Words | 6 Pages

Discussion Week one- During the first week of this experiment we used a Spectronic 20 to measure the light absorbance and the percent of light transmitted. A Spectronic 20 is a machine that measures the amount of light that passes through the solution (Lewiston, 2014). For week one the goal of the experiment was to find the analytical for KMnO4.

Read More

Lab Report Balanced Chemical Equation

2042 Words | 9 Pages

1. For the demo experiment, the balanced chemical equation is as follows: (NH4)2Cr2O7(s)=Cr2O3(s)+N2(g)+4H2O(g). After the lightning of Ammonium dichromate, Chromium (III) oxide was formed while the Nitrogen and Water escaped into the atmosphere in a gaseous phase. Ammonium dichromate((NH4)2Cr2O7) gave rise to Chromium (III) oxide (Cr2O3), Nitrogen Gas(N2) and water (H2O) In terms of microscopic level, the ratio between reactants and products is as follows.

Read More

Stoichiometry And Limiting Reagents Lab Report

1237 Words | 5 Pages

Verna Wang Hannah Palmer CHEM 101-069 Lab 11-19-16 Stoichiometry and Limiting Reagents Lab Report Purpose: We are using the reaction of sodium hydroxide and calcium chloride to illustrate stoichiometry by demonstrating proportions needed to cause a reaction to take place. Background: Just like a recipe would call for a specific amount of one ingredient to a specific amount of another, stoichiometry is the same exact method for calculating moles in a chemical reaction. Sometimes, we may not have enough of or too much of one ingredient , which would be defined as limiting and excess reagent, respectively.

Read More

Alkaline Phosphatase Enzyme Lab Report

2575 Words | 11 Pages

Use these results to determine the product concentration, using Beer-Lambert’s Law: A= ɛCl (where A is the absorbance, ɛ is the molar absorptivity, C is the product concentration and l is the length of solution that the light passes through). Calculate the product concentrations at every minute for 10 minutes for all 7 of the test tubes using Beer-Lambert’s Law. Plot a graph of product concentration vs. time and then use the gradients of the 7 test tubes to determine the velocities of the reaction. After calculating the velocities, plot a Michaelis-Menten graph of velocity vs. substrate concentration.

Read More

Spectrophotometry Essay

932 Words | 4 Pages

1.1. UV-SPECTROPHOTOMETRY Spectroscopy is the measurement and interpretation of electromagnetic radiation absorbed or emitted when the molecules or atoms or ions of a sample move from one energy state to another energy state. Spectroscopy is a general methodology that can be adapted in many ways to extract the information you need (energies of electronic, vibrational, rotational states, structure and symmetry of molecules, dynamic information). Ultraviolet-Visible Spectrophotometry is one of the most frequently employed techniques in Pharmaceutical analysis.

Read More

Colorimeter Lab Report

1015 Words | 5 Pages

The measured absorbance in such events is actually the sum of the absorbances of the individual species each having its own absorptivity. 3. Instrumental deviation: - This deviation arises depending upon the bandwidth of the instrument. The bandwidth of the instrument depends upon the wavelength resolving capacity of the system consisting of the monochromator and silts and varies from instrument to

Read More

Determination Of Vitamin C Titration

791 Words | 4 Pages

Determination of Vitamin C Concentration by Titration Serena Kim Vasantha Susarla McGill University Introduction This experiment is being performed to determine the concentration of Vitamin C in different solutions by performing a redox reaction with potassium iodate. Vitamin C, which is also called ascorbic acid, can be naturally found in citrus fruits and common vegetables. Vitamin C is considered as an antioxidant because it acts as a coenzyme and reducing agent in several different ways.

Read More

Soap's Effect On The Surface Tension Of Water

864 Words | 4 Pages

Due to the unaccountability of the inconsistency in droplet size, many of the numbers may be varied because in one trial a huge droplet may count as one, but in another trial, I may have counted a small droplet as one, which causes results to possibly be

Read More

Biological Membranes Lab Report

1621 Words | 7 Pages

The effects of alcohol on Biological Membranes. Introduction In this experiment it will be analysed the damage alcohols can have on biological membranes. Membranes are made up of lipids and proteins. Membranes usually help maintain the balance in a cell as it holds all the cellular materials.

Read More

More about Limiting Reactant Lab Report

Open Document