Solutions and pH
Quiz
•
Biology
•
9th Grade
•
Practice Problem
•
Medium
Standards-aligned
Brianna Nixon
Used 10+ times
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19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A molecule, such as water, that has partially charged positive and negative areas is
neutral
universal
polar
nonpolar
Answer explanation
A molecule like water has regions with partial positive and negative charges due to its shape and the electronegativity of oxygen. This characteristic makes it a polar molecule, as opposed to neutral or nonpolar substances.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What would be the best solution to add to a strong base to neutralize it?
strong acid
strong base
weak base
weak acid
Answer explanation
To neutralize a strong base, adding a strong acid is the best solution. The strong acid will react with the strong base to form water and a salt, effectively reducing the pH and achieving neutralization.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bases cause litmus paper to turn blue.
True
False
Answer explanation
True. Bases are substances that increase the pH of a solution, and when litmus paper is exposed to a basic solution, it changes color to blue, indicating the presence of a base.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a neutral solution the pH is always equal to ___.
7
Indicators
Sour
Bitter
Supersaturated
Answer explanation
In a neutral solution, the concentration of hydrogen ions equals that of hydroxide ions, resulting in a pH of 7. This is the standard value for neutrality in the pH scale.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Acids contain high amounts of ____ ions.
Hydrogen (H+)
Indicators
Sour
Bitter
Supersaturated
Answer explanation
Acids are defined by their ability to donate protons (H+ ions) in a solution. Therefore, they contain high amounts of hydrogen ions, making 'Hydrogen (H+)' the correct answer.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A solution with a pH of ____ is a strong base.
14
Indicators
Sour
Bitter
Supersaturated
Answer explanation
A solution with a pH of 14 is considered a strong base, as the pH scale ranges from 0 to 14, with 14 being the most alkaline. Therefore, the correct answer is 14.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Saltwater is an example of a solution. Compared to the salt, which term best describes the water in the solution?
Solute
Solvent
mixture
suspension
Answer explanation
In a solution, the solute is the substance being dissolved (salt), while the solvent is the substance doing the dissolving (water). Therefore, in saltwater, water is best described as the solvent.
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