To perform this experiment, we will utilize emission spectra, titrations, and thermal gravimetric analysis, using knowledge from Experiments 10, 4, Titrations of Na2CO3 and NAHCO3 by HCl (hydrochloric acid) will be performed to determine the concentration of HCl, as well as the number of moles of HCl present within the sample of baking soda. As a result, we will be able to determine the molar concentration of HCl by determining its equivalence point (the point on the graph where the exact amount of rectant needed to perform a reaction has been added) from graphical analysis. Na2CO3(aq.) + HCl(aq.) ==> NaHCO3(aq.)
Stoichiometry is a section of chemistry that involves using the relationships between reactants or products in a chemical reaction to determine the desired quantitive data. 4. Using the balanced chemical reaction between Sodium carbonate and Calcium Carbonate given in page 92 of your lab manual (first paragraph of procedure), find the mass of Sodium Carbonate (in grams) needed in reaction? Na2CO3(aq)+CaCl22H20(aq)-CaCO3(s)+2NaCl(aq)+2H2O Date:_____3/30/2015____________ Name______Chloe Flake______________ 1. Title: 1pt Stoichiometry Of A Precipitation Reaction 2.
Finally, the last step involved titrating the water. The tap water and buffer solution were poured into the beaker, and the EDTA solution was titrated into the beaker. A drop of EDTA was added every 5 seconds, and this continued until the solution turned the same light blue as observed in the first step of the experiment. The amount of EDTA needed was then used to calculate the hardness of the water sample. This whole process was repeated two times for two additional trials.
Testing Saccharides Saccharides, which are also known as carbohydrates, are the most essential biomolecule for the human body. Carbohydrates are what run the body to function. Saccharides help your brain and nervous system to function properly. What we were testing in both experiments was to see if there was a presence of saccharides. More specifically in these experiments, we tested if there were reducing sugars with the Benedicts reagent in the first experiment and if there were starches present with Lugol’s solution in the second experiment.
Experiment #4: Muddy Waters Chemistry 1001 Taylor Ward Tuesday P.M. Rm. 106 T.A. : Kevin Monday October 24th, 2011 Abstract: For the first part of lab 4 we synthesized potassium aluminium sulfate dodecahydrate (KAl(SO4)2 12H2O), after the synthesis process was completed we used the product to try and clear a beaker of muddy water. We used aluminium that was dissolved into solution and the addition of an acid to create the final alum crystals; with these processes we were able to identify the percent yield of the alum. We could also determine the efficiency of our alum at clearing the beaker of muddy water.
Introduction: In this experiment, calcium chloride was reacted with sodium hydroxide according to the following balanced equation: CaCl2(aq) + 2NaOH(aq) Ca(OH)2(s) +2NaCl(aq) The purpose doing this reaction was to perform stoichiometry calculations. Stoichiometry is the process of keeping track of the quantitative relationship between reactants and products in a reaction. In a stoichiometry problem, the coefficients in the balanced equation provide the correction number of moles of each substances that is needed to complete the reaction. Often in a reaction, there is a limiting reagent since the exact proportions of moles of the reactants are not present. Thus, a limiting reagent is the reactant that determines how far the reaction will go before causing the it to stop since there are fewer moles of it than the proportion requires.
Whiles the cuvette remains in the machine for the entire 5 minutes and noting the value every 30 seconds as given in the instruction. The process was repeated by using a clean cuvette each time but in the presence of different amount of trypsin inhibitor (stock solution of 0.1mg/ml in buffer).and by putting the mix in a beaker separately to avoid melting/dissolve any
Once calculated, these results can be analyzed and will either validate or refute my hypothesis. Introduction (Library Research): Ascorbic acid (vitamin C) is found in orange juice. In this experiment, orange juice made from the concentrate was measured for decreases/increases of off-flavours (furfural and α-terpineol) and for decreases/increases of ascorbic acid. Sodium hydroxide (NaOH) as well as hydrochloric acid (HCl) were added during separate trials to change the PH in the orange juice. An increase of PH from 3.2 to 4.2 enabled the protection of ascorbic acid levels, without increasing the levels of other enzymes.
By doing this, it will show the initial pH before any acid or base has been added into the solution. Followed by that, add 5 drops of .1 M HCl into the tube, mix, and record the new pH in the acid row found on Table 1. After that continue adding 5 drops at a time until 30 drops total have been added, make sure to record the pH in-between every 5 drops. Once 30 drops have been reached, quit adding and record the final pH. Using the other test tube of the same solution, again, measure the initial pH and repeat the same procedure except adding .1 M NaOH, followed by recording the data in the base row in
C121 Elementary Chemistry Lab I “Building a Better Water Filtration System: An Investigation of the Properties, Changes, and Composition of Matter” Ian McGrath September 30, 2012 Period 1 “Building a Better Water Filtration System: An Investigation of the Properties, Changes, and Composition of Matter” Objective – Make a filtration system to filter the polluted water Reference – Mr.Harnish Procedure – 1. Put on safety goggles and lab apron 2. Make a filtration system using the PVC pipe 3. Cover bottom with cheesecloth and tie it with a rubber band 4. Get 200 mL sample of polluted water and place into 250 beaker 5.