15 Questions
What is the primary standard substance used in the experiment for determining the normality of NaOH?
HOOC-COOH
Which indicator is used in the titration experiment involving NaOH and HOOC-COOH?
Phenolphthalein
What is the reaction between NaOH and HOOC-COOH according to the given theory?
$HOOC-COOH.2H2O (aq) + 2NaOH (aq) ightarrow NaOOC-COONa (aq) + 2 H2O$
What type of acid is HOOC-COOH?
Diprotic acid
What equation represents the theory of titration mentioned in the text?
$y V_{A}^{A} = x V_{B}^{B}$
What is the purpose of using phenolphthalein in the titration experiment involving NaOH and HOOC-COOH?
To indicate the endpoint of the titration by changing color at the equivalence point
Which substance is a primary standard substance in the titration experiment involving NaOH and HOOC-COOH?
HOOC-COOH.2H2O
What is the role of NaOOC-COONa in the titration experiment involving NaOH and HOOC-COOH?
It forms a complex with HOOC-COOH.2H2O
Which statement accurately describes the reaction between HOOC-COOH.2H2O and NaOH?
It results in the formation of NaOOC-COONa and H2O
Why is HOOC-COOH.2H2O considered a diacidic weak acid in the context of the titration experiment?
Because it can donate two protons
What is the purpose of using phenolphthalein in the titration experiment involving NaOH and HOOC-COOH?
To indicate the equivalence point of the titration by changing color from pink to colorless
Which substance is a primary standard substance in the titration experiment involving NaOH and HOOC-COOH?
HOOC-COOH.2H2O
What is the role of NaOOC-COONa in the titration experiment involving NaOH and HOOC-COOH?
It neutralizes the excess base
What equation represents the theory of titration mentioned in the text?
$y V_{A}S_{A} = x V_{B}S_{B}$
What is the reaction between NaOH and HOOC-COOH according to the given theory?
$HOOC-COOH. 2H_{2}O + NaOH → NaOOC-COONa + 2 H_{2}O$
Study Notes
Titration Experiment
- The primary standard substance used in the experiment to determine the normality of NaOH is potassium hydrogen phthalate (KHP).
Titration Reaction
- The reaction between NaOH and HOOC-COOH (potassium hydrogen phthalate) is a neutralization reaction.
- The reaction involves the hydroxide ions (OH-) from NaOH reacting with the hydrogen ions (H+) from HOOC-COOH.
Indicator and Acid Type
- Phenolphthalein is the indicator used in the titration experiment involving NaOH and HOOC-COOH.
- HOOC-COOH (potassium hydrogen phthalate) is a diacidic weak acid.
Purpose of Phenolphthalein
- The purpose of using phenolphthalein in the titration experiment is to indicate the endpoint of the reaction, as it turns pink in basic conditions.
Primary Standard Substance
- Potassium hydrogen phthalate (KHP) is the primary standard substance in the titration experiment involving NaOH and HOOC-COOH.
Role of NaOOC-COONa
- NaOOC-COONa is the salt formed during the reaction between NaOH and HOOC-COOH.
Titration Equation
- The equation representing the theory of titration mentioned in the text is: HOOC-COOH + NaOH → NaOOC-COONa + H2O
This quiz covers the determination of the strength of various solutions through standard chemical reactions. Topics include the strength of NaOH and HCl solutions with standard acidic and basic solutions.
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