is to titrate a weak acid with a strong base. In a titration of a weak acid with a strong base the titrant is the strong base and the analyte is a weak acid. The reaction that will occur is the direct transfer of protons from the weak acid to the hydroxide ion. The data gathered will be represented on the titration curve‚ a graph of the volume of titrant being the strong base plotted against the pH .The pH is an indicator of an acids strength. The titration curve can be used to determine the pKa. By
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Weak Acid Titration Abstract: Our method for determining the unknown weak acid was to determine the equilibrium constant K from the molecular weight of the weak acid from our titration data. In this lab the acid Potassium hydrogen phthalate and two unknown acids were titrated. We determined the molar mass of the Potassium hydrogen phthalate‚ for the unknown acids we calculated the molar mass and the Ka values. We used NaOH as the known base for titrating in all three of the titrations. Our
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Title: Stoichiometry Reaction Objectives: 1. To decompose sodium hydrogen carbonate (sodium bicarbonate) by heating. 2. To accurately measure the degree of completion of the reaction by analysing the solid sodium carbonate product. 3. To calculate amount of product with given amount of reactant. 4. To determine amount of heat release in the reaction. Results: Part 1: Thermal Decomposition of NaHCO3 Materials Mass (g) Clean and dry test tube 15.1632 Clean test tube + NaHCO3 17.1647
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Synthesis of a Cobalt Complex 3.0 Percent Halide Analysis of Cobalt Complex 4.0 Preparation and Standardization of a 0.3 M Hydrochloric Acid solution 5.0 Percent Ammonia Analysis of Cobalt Complex 6.0 Preparation and Standardization of a 0.1 M Sodium Thiosulfate solution 7.0 Percent Cobalt Analysis of Cobalt Complex 8.0 Discussion and Conclusions Title Page Title (centered) Name Date CHEM 1212K Class Time & Date Instructor Name Introduction (5 pts) Discuss the goal of the semester
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by adding 1mL of Folin-Ciocalteau Phenol Reagent to 39mL of distilled water. Solution A: Buffered copper solution Prepared by adding the following to 80mL of distilled water in a 100mL volumetric flask: 1 mL glacial acetic acid‚ 23.2 g NaCl‚ 3.2 g sodium acetate The solution is well mixed to dissolve all components‚ and 0.5g of CuSO4 is added‚ mixed again‚ the pH adjusted to 4.8 with the addition of NaOH solution‚ mixed again‚ and distilled water is added up to 100-mL mark. The final pH is adjusted
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Pharmacokinetics The pKa of Bupivacaine is 8.1. It possesses a great degree of lipid solubility and is highly protein bound. It is 14 times more potent than lignocaine. Absorption and distribution The site of injection‚ dose administered‚ addition of vasoconstrictor agent and volume of drug influences the systemic absorption of local anaesthetic. A local anaesthetic solution distributed to an area of greater vascularity leads to greater rate and degree of absorption. The final plasma concentration
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column was clamped in a vertical potion to the stand. 8mL of eluent was added to the column and the silica gel was mixed with the remainder of the eluent. The mixture was carefully poured into the column. More eluent was added to the beaker until all the silica could be poured into the column. The eluent was drained and a 1cm layer of sand was added to the top of the silica. More eluent was added and drained until it was level with the top of the sand. Extraction of pigments 3-4 baby spinach
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recipes have: baking soda‚ citric acid‚ and cornstarch. When baking soda and citric acid are mixed together with some water‚ they undergo a chemical reaction. Specifically‚ this reaction involves acid-base chemistry‚ since the baking soda—also known as sodium bicarbonate (NaHCO3)—is a weak base‚ and citric acid (C6H8O7) is a weak acid. This reaction is shown in Equation 1‚ below. As you can see from Equation 1‚ the acid-base reaction produces carbon dioxide (CO2) gas. This gas is what makes the fizzy bubbles
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Data Tables: Part 1: Chemicals Well No. Observations of the Reaction A. NaHCO3 + HCl 1A Bubbles appeared for 5 seconds. Now clear in color‚ no bubbles B. HCl + BTB 2A Turned from clear to yellow C. NH3 + BTB 3A Turned from clear to dark blue D. HCl + blue dye 4A Turned from clear to green E. Blue dye + NaOCl 5A Turned from blue to light blue with the 1 drop of HCl 6A Turned from blue->light blue->yellow->light yellow->clear‚ transparent F. NaOCl + KI 7A Turned from clear to Light yellow
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5-tetrachlorobenzene) into its components by extraction. The mixture is dissolved in diethyl ether (common name is ether). Both components are soluble in this solvent. Then a 1 M NaOH solution is used to extract the benzoic acid in the form of its water-soluble salt‚ sodium benzoate (three extractions to ensure complete removal)‚ leaving the neutral compound in the ether layer. The three aqueous extracts are combined and the two components are recovered as follow: 1. The neutral compound by washing‚ drying and evaporating
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