Final Chapters 18,19 22
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a precipitate?
Back
An insoluble compound that comes out of a solution during a double-displacement reaction.
2.
FLASHCARD QUESTION
Front
Why can ammonia be considered a base even though it does not contain –OH?
Back
Ammonia attracts a hydrogen ion from water to form an ammonium ion and a hydroxide ion.
3.
FLASHCARD QUESTION
Front
In the reaction HCl + NaHCO₃ → NaCl + CO₂ + H₂O, what is the salt formed?
Back
NaCl.
4.
FLASHCARD QUESTION
Front
What is an acid according to the document?
Back
A substance that produces hydrogen ions in a water solution.
5.
FLASHCARD QUESTION
Front
What is a strong acid?
Back
An acid that dissociates almost completely in solution.
6.
FLASHCARD QUESTION
Front
What is a double-displacement reaction?
Back
A reaction where two compounds exchange ions to form two new compounds.
7.
FLASHCARD QUESTION
Front
What is the pH scale?
Back
A scale that measures the acidity or basicity of a solution, ranging from 0 (acidic) to 14 (basic).
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