Reagents: NaOH (~3 mol/L), HCl (~3 mol/L), potassium hydrogen phthalate (KHP), a
ID: 541040 • Letter: R
Question
Reagents: NaOH (~3 mol/L), HCl (~3 mol/L), potassium hydrogen phthalate (KHP), ascorbic acid (vitamin C) tablets, and sodium bicarbonate (baking soda powder)
What is the chemical reaction taking place for each titration? Write balanced chemical formulas.
often a small that are therapeutically active are quite required. The chemical compounds component of the pill measures to and are . ensure accurate dosing necessary I explore some processes similar to those that are followed in conducting the In this project, we control. 2. PROJECT DESCRIPTION need substances of accurately know To conduct quantitative analysis in the lab we often composition, or solutions of accurately known concent (standard , standard solutionstandard material, etc.). compound, The first Pro have to embrace wi that yo1 our team EDEN TO DIE CONCERATON be working on the preparation of a lardized base solution (NaOH) and a standardized (HC). The process of standardization become familiar EIN PEEE acid solution utilizes analysis. You will volumetric with laboratory techniques necessary to quan substances, that is, finding out how much of the substance is presentSince your team will use the it is standardized solutions for the actual analysis, CONCEAD DEPENSE THE COPPEG a UTIONE OFTBREND important that you carry out this process diligently and lat you save your solutions for the weeks of work. With those standards ready, you can perform the quality control (titration, Figure 2) of the products provided in the lab for your analysis. A solution of potassium hydrogen phthalate (KHP) can be use as primary standard to standardize the base (NaOH). Then the base Figure 2: Titration set-up can be used to standardize the acid (HCI) For this project we will be performing quality control on two commercial products. Your instructor will provide vitamin C tablets or baking soda powder. Using your chemistry knowledge and experience you can probably tell that these two substances have acid/base properties. In this project you will determine the amount of acid or base that is present as active ingredient in the product provided to you and compare your results with the reports from the manufacturer. You will also have the choice of bringing one household product and do the same analysis in the lab. You may already have a particular interestjust keep in mind the limitations of our General Chemistry Lab 43Explanation / Answer
Standard solutions are those which are required to know the exact amount of titrant. For example, NaOH solution is not a standard solution because it is highly hygroscopic in nature due to which the exact concentration is difficult to prepare. So as to know the exact concentration, it should be titrated with already known exact concentration solution, which is known as standard solution i.e KHP in this reaction.
The balanced equation is:
KHC8H4O4 + NaOH H2O + NaKC8H4O4
water salt
As per the information provided, Vitamin C is ascorbic acid which id acidic in nature while baking soda is sodium hydrogen carbonate which is basic in nature
The reaction of ascorbic acid (C6H8O6) with baking soda is
C6H8O6 + NaHCO3 NaC6HO6 + CO2 + H2O
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