Multiple Choice
Which of the following occurs in the presence of tetrodotoxin?
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1. Intro to General Chemistry
Chemical Properties
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Which of the following statements about potassium hydroxide (KOH) is correct?
A
KOH is a strong base that readily dissociates in water.
B
KOH is insoluble in water and forms a precipitate.
C
KOH is a weak acid that partially ionizes in water.
D
KOH is a neutral compound with no effect on pH.
Verified step by step guidance1
Identify the nature of potassium hydroxide (KOH) by considering its chemical composition: KOH consists of potassium ions (K\+ ) and hydroxide ions (OH\- ).
Recall that hydroxide ions (OH\- ) are characteristic of bases, and compounds containing OH\- that dissociate completely in water are classified as strong bases.
Understand that KOH is highly soluble in water, meaning it dissolves readily and dissociates completely into K\+ and OH\- ions, increasing the hydroxide ion concentration in solution.
Recognize that because KOH increases OH\- concentration significantly, it raises the pH of the solution, confirming its behavior as a strong base rather than an acid or neutral compound.
Conclude that the correct statement is that KOH is a strong base that readily dissociates in water, while the other options describing it as insoluble, a weak acid, or neutral are incorrect.
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