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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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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If energy is absorbed‚ the reaction is called endothermic. Materials: spatula sodium hydroxide pellets (NaOH) 1 Styrofoam cup 1.0 M sodium hydroxide (NaOH) 1 100-mL graduated cylinder 0.5M Hydrochloric acid (HCl) 1 400-mL beaker 1.0 M hydrochloric acid (HCl) 1 50-mL beaker distilled water thermometer centigram balance Procedure: Reaction 1: a. Measure 100mL of distilled water into a plastic-foam cup. Place the cup inside a 400mL beaker for support.
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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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The solution in the test tube from step 9 contains the Cu2+ ions. To this solution‚ add 1 mL of 3% H2O2. Boil the solution down to a volume of about 1 mL. Now add 6 M HCl until the pH reaches 0.5. Once the pH has been lowered to 0.5‚ add 1 mL of 1 M CH3CSNH2 (thioacetamide) to the test tube. 15. Heat the test tube in a BWB under a fume hood for at least 5 minutes. The reactants will generate H2S ‚ a toxic gas‚ in
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agar-water gel test. In the glass tube set-up‚ two cotton plugs soaked in two different substances (HCl and NH4OH) were inserted into the two ends of the glass tube. The substance with the lighter molecular weight value (NH4OH‚ M = 35.0459 g/mole) diffused at a faster rate (dAve = 25.8cm)‚ resulting in the formation of a white ring around the glass closer to the side of the heavier substance (HCl‚ M = 36.4611 g/mole; dAve = 10.8 cm). The agar-water gel set up was composed of a petri dish of agar-water
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Obtain and set up a simple calorimeter. Add 100 mL of 1.00 mol/L HCL(aq) to the calorimeter using a 100 mL graduated cylinder. On the data table created in the first step‚ take note of and record the initial temperature of HCL(aq). Collect no more than 0.80 g of MgO(s) powder. Record the mass on the data table. A group member should then add MgO(s) powder to the calorimeter containing HCL(aq). Make sure to swirl gently. After a certain time when the temperature no longer rises
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However‚ for the titration of HCl(aq) with the same titrant‚ 21.2 mL was added (Figure 2) and the concentration was calculated to be 0.377 M. Since the same titrant is used in both titrations‚ the calculated concentration in each part should have also been the same. However‚ the concentration
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2.MATERIALS and METHODS 2.1. Nature of Reactants 2.1.1 We placed 3mL of 3 M HCl into each of 3 seperate test tubes. Next we added mossy zinc to the first test tubes‚ Sn granules to the second and Cu filings to the third and compared the rates of evolution of hydrogen gas in each test tube. 2.1.2. We mixed 3mL of 0.02 M KMnO4 and 2mL of 3 M H2SO4 in a test tube and stirred using a glass rod. Next‚ we divided the solution into two. We added 2mL of 0.03 M Na2C2O4 solution to the first half and
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