Volumetric analysis questions | form three Chemistry
(387) Question Category: Multiple choices The PH value of a solution of sulfuric acid could be increased by adding an equal volume of
Answer / Solution A [ water ] |
(3928) Question Category: Multiple choices What volume of 0.2M H2SO4 will be required to neutralize completely 25.0 cm3 of 0.05 M KOH?
Answer / Solution UNSOLVED |
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(4963) Question Category: Practical You are required to determine the purity of an impure NaOH solution contaminated with NaCl by using pure HCl. Given the following soultion: AA: 1.1g of the impure NaOH dissolved in a 0.25 dm3 of a solution and BB: 0.73g of a pure HCl present in a 0.2dm3 of a solution. Proceed as follow: Titrate the acid( in a burette) against the impure NaOH( in a conical flask) using two drops of methyl orange (MO) as ana indicator . Record the volume of an acid used. Repaeat the titration to obtain three more titre values and record your results in a tabular form. Questions
Answer / Solution UNSOLVED |
(4966) Question Category: Practical You are required to standardize dilute hydrochloric acid using standard aqueous sodium carbonate of 0.1M concentration. Proceed as follows:
Questions (a) which is an acid or base between AX and AY? (b) What is the mean titre volume of the acid> (c )Write a balanced chemical equation for this reaction. (d) Calculate molarity of the acid. (e ) Calculate the mass of the acid dissolved in one litre of the solution. Answer / Solution UNSOLVED |
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(4967) Question Category: Practical You are provided with the following solutions X: A 0.5 M Sulphuric acid solution Y: A monovalent metal hydroxide made by dissolving 4.00 g of MOH in distilled water to make up to 1000 cm3 of solution. MO: Methyl orange indicator. Procedure (i) MEasure exactly 20cm3 of X by using 100cm3 measuring cylinder. Carefully add distilled water to 100cm3 mark then stir, Call this solution X1. Fill X1 into a burette. (ii) Titrate X1 against 20.00 cm3 or 25.00 cm3 of Y using two drops of the indicator, obtain three accurate values. Record your results in a tabular form. Questions. (a) (i) The color change at the end point was from ___ to ____. (ii) ___ cm3 of Y required ___ cm3 of X1 for complete reaction. (b) Write a balanced chemical equation for the reaction between X1 and Y (c ) Calculate the following
(d) Identify metal M and write its electronic configuration (e ) State two properties of each X and Y. Answer / Solution UNSOLVED |
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