You are asked to determine the alkali present and the percentage of each in a component of a sample material containing components of NaOH, Na,CO, and NaHCO, or mixtures of this together with inert material. Each sampie being tested weighs 29 and uses hydrochiaric ocid for neutralization. Sample 1: Using phenolphthalein indicator, 48.64ml ocid was used. A duplicate sample needed 97.28ml of acld was used with methyl orange Indicator. Sample 2: No color change using phenolphthalein as an Indicator but with methyl orange 76.94mi acld is required. Sample 3. To cause a color change. the sample was titrated cold with phenolphthaleln, 30.58ml of acid is necessary, and an addifional 33.19ml was required for complete neutralization

You are asked to determine the alkali present and the percentage of each in a component of a sample material containing components of NaOH, Na,CO, and NaHCO, or mixtures of this together with inert material. Each sampie being tested weighs 29 and uses hydrochiaric ocid for neutralization. Sample 1: Using phenolphthalein indicator, 48.64ml ocid was used. A duplicate sample needed 97.28ml of acld was used with methyl orange Indicator. Sample 2: No color change using phenolphthalein as an Indicator but with methyl orange 76.94mi acld is required. Sample 3. To cause a color change. the sample was titrated cold with phenolphthaleln, 30.58ml of acid is necessary, and an addifional 33.19ml was required for complete neutralization

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

You are asked to determine the alkali present and the percentage of each in a component of a
sample material containing components of NaOH, Na,co, and NaHCo, or mixtures of this
together with inert material. Each sample being tested weighs 29 and uses hydrochioric acid for
neutralization.
Sample 1: Using phenolphthatein indicator. 48.64ml acid was used. A dupilcate sample needed
97.28mi of acid was used with methyl orange indicator.
Sample 2: No color change using phenolphthalein as an indicator but with methyl orange 76.94mi
acld is required.
Sample 3. To cause a color change., the sample was titrated cold with phenolphthalein, 30.58ml of
acid is necessary.and an addifional 33.19ml was required for complete neutralization
Sample 4: The process required 79.92ml of acid until the pink of phenolphthalein disappeared. On
adding the excess of the acid, boling and titrating back with alkali, it was found that the alkall was
exactly equivalent to the excess acid added,

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