A Student Doing a Titration of HNO₃ with Sodium Hydroxide

question 142

Multiple Choice

A student doing a titration of HNO₃ with sodium hydroxide wants to use methyl orange as an indicator. Methyl orange changes color at pH = 3.7. Which of the following will be true of this experiment?

• A) The concentration of HNO₃ reported will be too high.
• B) The concentration of HNO₃ reported will be too low.
• C) The concentration of HNO₃ will be reported correctly.
• D) The experiment cannot be done at all.

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Definitions:

Sum of Squares

A statistical technique used to measure the variation or dispersion of a set of numbers, calculated by summing the squares of differences from the mean.

Sample Means

The average value of a set of observations, taken from a sample of the population.

Analysis of Variance

A statistical method used to compare the means of three or more samples to find out if at least one is significantly different from the others.

Population Means

The average value of a particular characteristic across all members of a defined population.