Table 3 is the titration of the reaction mixtures with the NaOH solution prepared. Table 3. Calculations: Standardize NaOH Average NaOH after 3 trials was 0.6578 M NaOH Moles of HCL Molarity of HCL (average between bottle 1 & 1A) Grams of HCL Grams of Water 4.319g HCL = 4.7181 g H20 Moles of Water in HCL Solution Moles of Water added Moles of ester initially present moles of ester Moles of alcohol initially present Moles of acid present Moles of carboxylic acid present‚ moles
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would work the fastest because there was no environmental factors affecting the outcome. As the temperature of the hydrochloric acid was raised‚ the enzyme’s speed should have slowed. In the results‚ the ice water worked the fastest and the 50° of HCL was the slowest. But the result of the 38°C was off by at least 90 ml/min in comparison to the tap water when it was supposed to work slower. These results could have been from many different errors that were made during the lab. The first possible
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reps were completed and the resulting data led to the finding of the molarity of the sodium hydroxide. The second part of the titration series involved titrating the same prepared sodium hydroxide solution with Hydrochloric Acid (HCL). This is how the molarity of the HCL was determined. The last part to the titration series was necessary to determine the equivalent weight of the acid. The equivalent weight for this unknown was calculated to be ~197 g/mol H+ Once these titration series experiments
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Vicente Viloria CHM 130 LL Section 22258 Lab 12: Introduction to pH‚ Household Products and Buffers 12/9/14 Introduction In this experiment the students will be determining the pH of household products along with other solutions using several different indicators as well as a pH meter. The experiment also has the student determining what the buffer solution is in an aqueous solution. The student will also be testing the pH of milk of magnesia and will see how it affects the stomach acid. Lastly
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with a cross. 4. Record the time taken for the cross to disappear. 5. Repeat the experiment using 80‚ 60‚ 40 and 20 cm3 of. sodium thiosulfate solution respectively. In each case‚ add water to make the volume up to 100 cm3 and mix before adding HCl. 6. If the initial sodium thiosulfate concentration is 0.1 M‚ subsequent concentrations will be 0.08 M‚ 0.06 M‚ 0.04 M and 0.02 M respectively. 7. Record the results in results table. 8. Draw a graph of 1/time against concentration. This is effectively
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Acid/ Base Titration Lab Design III Materials: Goggles HCl NaOH Distilled Water Label Beaker Graduated Cylinder Pipet Stirring rod Buret with clamp Stopper Ring Stand Utility Clamp Computer Computer Program pH probe Procedure: 1) 2) Goggles were put on. 3) 0.1 M NaOH solution was made using 0.4 g NaOH and 100 mL distilled water. The ingredients were added together in a beaker and stirred. 4) The buret was standardized by adding 10 mL of distilled water‚ rolling
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APPARATUS: Measuring Cylinder‚ Beakers‚ Spatula‚ Conical Flask‚ Measuring Scale‚ Funnel‚ Dilute HCL‚ Calcium Carbonate (Present in Tums)‚ Sodium Carbonate (Present in Andrews Salts)‚ Petri Dish‚ Rubber Stopper‚ Gas Syringe METHOD: 1. Wash all apparatus. 2. Measure and transfer 5g Calcium Carbonate to Petri Dish. 3. Measure and transfer 25cm3 of HCL to Beaker. 4. Place acid into conical flask and Calcium Carbonate and cover
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Edexcel Level 3 BTEC Nationals in Applied Science (Forensic Science) Unit 01 – Fundamentals of Science Assignment 01-01‚ Volumetric Analysis Date set: Sept 2010 Date due: Oct 2010 This assignment addresses the following Criteria… Unit 1 – Fundamentals of Science Assessment and grading criteria To achieve a pass grade the evidence must show that the learner is able to: To achieve a merit grade the evidence must show that‚ in addition to the pass criteria‚ the learner is able to: To
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and Equipment The following chemicals and equipment will be utilized for the experiment: |Chemicals |Equipment | |2.0 M HCl |LabPro unit with temperature probe | |2.0 M NaOH |2 Styrofoam cups
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tube setup and the water agar-gel setup. In the glass tube setup‚ two cotton balls were soaked in the solutions of hydrochloric acid (HCl) and ammonium hydroxide (NH4OH) and were simultaneously placed on both ends of the tubing.NH4OH had a lighter molecular weight of 35 g/mole which diffused at a faster rate of 24.8 cm and formed a white smoke near the HCl end that had the molecular weight of 36 g/mole. The water agar-gel setup was made up of a petri dish containing the gel with three wells
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