Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 48.A substance that has a high degree of purity and is used in direct standardization purposes: a. Analyzed reagent C. USP grade reagent b. Primary standard reagent d. Technical grade reagent 49. When a weak acid is titrated with strong base, the indicator used is a. Methyl red C. Titration not possible Methyl orange b. phenolphthalein d. 50.An organic compound that changes from one color to another at a certain pH is called: a. Indicator C. Standard solution b. Buffer d. Test solution

Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by completions of the statement. Select the one lettered answer or completion that is best in each case. Write your answer before each number. 48.A substance that has a high degree of purity and is used in direct standardization purposes: a. Analyzed reagent C. USP grade reagent b. Primary standard reagent d. Technical grade reagent 49. When a weak acid is titrated with strong base, the indicator used is a. Methyl red C. Titration not possible Methyl orange b. phenolphthalein d. 50.An organic compound that changes from one color to another at a certain pH is called: a. Indicator C. Standard solution b. Buffer d. Test solution

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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Concept explainers

Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.

Question

Multiple Choice
Each of the numbered items or incomplete statements is followed by answers or by completions of the statement.
Select the one lettered answer or completion that is best in each case. Write your answer before each number.
48.A substance that has a high degree of purity and is used in direct standardization purposes:
a. Analyzed reagent
C.
USP grade reagent
b.
Primary standard reagent
d.
Technical grade reagent
49. When a weak acid is titrated with strong base, the indicator used is
a.
Methyl red
C.
Titration not possible
Methyl orange
b.
phenolphthalein
d.
50.An organic compound that changes from one color to another at a certain pH is called:
a. Indicator
C.
Standard solution
b.
Buffer
d.
Test solution

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