acid‚ CH3COOH. • • • • • a strong acid: hydrochloric acid‚ HCl. an acidic commercial cleanser. a basic commercial cleanser. to use the titration curves to calculate the percent of the active ingredients in the commercial cleansers. to determine the Ka of a weak acid. Procedure Overview • • • • after calibration of the pH electrode and determination of the flow rate for the automatic titration‚ a NaOH solution is standardized against HCl. a pH titration curve for acetic acid is obtained and its pKa
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chloride (HCl) : Formula : HCl Nature : Covalent. Molecular Mass : 36·5u [i.e. HCl = 1 + 35·5 = 36·5] Occurrence : (i) Present in gastric juices. (ii) Present in volcanic gases. Laboratory preparation of HCl gas : Hydrogen chloride gas is prepared in laboratory by heating conc. H2SO4 with NaCl. NaCl + H2SO4 Heat → NaCl + NaHSO4 Heat → NaHSO4 + HCl Sodium hydrogen sulphate Na2SO4 + HCl Sodium sulphate (g) (g) ↑ ↑ Physical Properties of HCl : (i)
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Carbonate-Bicarbonate Mixture Belardo‚ Pia Jobelle J. Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila February 27‚ 2013 Abstract The analyte used is the soda ash which is titrated with an HCl titrant‚ standardized by Na2CO3. The indicators used are phenolphthalein for basicity and methyl orange for acidity. The two volumes of the titrant are then used to calculate percent composition of soda ash analyte. At the end of the experiment‚ the
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SBI4U-C 1 Lesson Introducing Biochemistry 1 Lesson 1 Biology SBI4U-C Introduction If you think about it‚ living things are made up of chemicals. The cells‚ tissues‚ organs‚ and organ systems that together make up a functioning organism are all the product of interacting chemicals. In order to understand how the organism functions‚ you must also recognize how these chemicals function. The study of the chemicals that are involved in living things is known as biochemistry
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a paper tray using an electronic scale. 2. Take (60 ml-80ml) of HCl and dissolve crushed eggshell in solution for eight to ten hours or until reaction between eggshell and acid is complete. 3. Rinse burette with NaOH solution and place in burette stand. 4. Rinse pipette with HCl. 5. Rinse conical flask with distilled water. 6. Filter acid and eggshell solution into beaker through funnel to remove unreacted HCl. (This step is necessary not for chemical reasons‚ but rather so that
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|(Mg) | | |Trial 1 |Trial 2 |Trial 1 |Trial 2 | |Volume of 1.00 M HCl |50.0 mL ± 0.5 mL |50.0 mL ± 0.5 mL |50.0 mL ± 0.5 mL |50.0 mL ± 0.5 mL | |Final temperature‚ t2 |28.9(C ± 0.1(C |28.8(C ± 0.1(C |44.8(C ± 0.1(C |44.4(
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accomplish this the experiment was split into two parts; part A and Part B. in Part A of the experiment a standardized 0.05 M solution of HCl was titrated into a 25 mL solution of saturated Ca(OH)2 which contained 2 drops of orange methyl identifier. Once the titration began‚ the HCl was added until the methyl orange endpoint was reached‚ and as a result the volume of the HCl needed for the endpoint to be reached could be used in determining the moles and in turn the molar solubility and the solubility constant
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Analysis of Soda Ash and Carbonate-Bicarbonate Mixture Submitted: February 27‚ 2013 Department of Chemical Engineering‚ Faculty of Engineering University of Santo Tomas España‚ Manila Abstract A standard acid solution like HCl can be used as titrant for the analysis of both soda ash and a carbonate-bicarbonate mixture. In the analysis of soda ash‚ the volume needed to neutralize the soda ash is used to compute for its alkalinity‚ in this experiment we obtained a 17.6 % alkalinity with an error
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Summary The Project entitled “A Study on customer perception and effectiveness of student’s scheme on sale of laptop in Bangalore” with reference to HCL Infosystems was conducted in partial fulfillment of the Post Graduate Diploma in Management. The Study was undertaken with the objective of: Analyzing the customer perception regarding HCL Laptops and finding out the effectiveness of students scheme on sale of Laptops. The study has also taken into consideration the key demand drivers‚ and
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In solution‚ acids conduct electricity * Turns blue litmus red Common properties of alkalis * Have a soapy feel * Bitter taste * In solution‚ good conductors of electricity * Turns red litmus blue Acid | Base | Neutral | - HCl-lining of stomach‚ cleaning metals‚ cleaning bricks‚ neutralising bases‚ pH maintenance in swimming pools- Acetic acid (CH3COOH) (systematic name ethanoic acid). Vinegar‚ made from oxidation of ethanol in wine. Used to flavour and preserve food- Citric
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