$CATEGORY: Science - Khan Academy/2.Acids, Bases and Salts/2.Acids, Bases and Salts--how strong are acid or base solutions

//Multiple Choice

What does the strength of an acidic solution depend on?
{
~ Only the amount of H⁺ ions
~ Only the volume of the solution
= Both H⁺ ions and volume
~ Temperature of the solution
}

Which solution will be the most acidic?
{
= A solution with high H⁺ concentration
~ A solution with low H⁺ concentration
~ A solution with high OH⁻ concentration
~ A neutral solution
}

If the concentration of OH⁻ ions in a solution increases, the solution becomes\:
{
~ More acidic
~ Less basic
= More basic
~ Neutral
}

What happens to the acidity of a solution when the H⁺ ion concentration decreases?
{
~ It becomes more acidic
= It becomes less acidic
~ It becomes neutral
~ It becomes more basic
}

Which solution is the least acidic?
{
~ A solution with highly concentrated H⁺ ions
= A solution with highly diluted H⁺ ions
~ A neutral solution
~ A solution with OH⁻ ions
}

What is the relationship between H⁺ ion concentration and acidity?
{
~ Higher H⁺ concentration means less acidic
= Higher H⁺ concentration means more acidic
~ Lower H⁺ concentration means more acidic
~ There is no relationship
}

If two solutions have the same number of H⁺ ions but different volumes, the more concentrated solution is\:
{
~ The one with the larger volume
= The one with the smaller volume
~ Both will have the same concentration
~ The one with fewer ions
}

If a sugar solution is less concentrated, its taste will be\:
{
~ More sweet
= Less sweet
~ Neutral
~ Bitter
}

If 100 H⁺ ions are dissolved in a small glass of water, the solution will be\:
{
~ Highly diluted
~ Neutral
= Most acidic
~ Least acidic
}

Which solution will have the lowest concentration of H⁺ ions?
{
= A solution with high volume and low ions
~ A solution with high ions and low volume
~ A neutral solution
~ None of these
}

If a solution becomes more basic after a chemical reaction, the concentration of\:
{
~ H⁺ ions increases
~ OH⁻ ions decreases
= OH⁻ ions increases
~ H⁺ ions remains constant
}

If the volume of a solution increases while the amount of H⁺ ions remains constant, the solution will become\:
{
~ More acidic
~ Neutral
= Less acidic
~ More basic
}

//True or False

The acidic strength of a solution depends only on the amount of H⁺ ions. {F}

The basic strength of a solution depends on the concentration of OH⁻ ions. {T}

A highly concentrated H⁺ solution is more acidic. {T}

A sugar solution becomes sweeter as its concentration decreases. {F}

Dilution decreases the acidity of a solution. {T}

The concentration of OH⁻ ions defines acidity. {F}

A solution becomes less acidic if the H⁺ ion concentration decreases. {T}

A larger volume with the same amount of H⁺ ions makes a solution less acidic. {T}

Basic strength decreases if OH⁻ ions are diluted. {T}

OH⁻ ions make a solution more acidic. {F}

//Fill in the blanks

If H⁺ ions are dissolved in a large volume of water, the solution becomes ________.
{
~ More acidic
= Less acidic
~ Neutral
~ Basic
}

Basic solutions have a high concentration of ________ ions.
{
~ H⁺
= OH⁻
~ H₂O
~ Neutral
}

The ________ the concentration of H⁺ ions, the more acidic the solution.
{
~ Lower
= Higher
~ Stable
~ Equal
}

A solution with a low concentration of H⁺ ions is ________.
{
~ More acidic
~ Neutral
= Less acidic
~ More basic
}

Acidity depends on the ________ of H⁺ ions.
{
~ Volume
~ Temperature
= Concentration
~ Pressure
}

If 100 H⁺ ions are dissolved in a small glass of water, the solution is ________.
{
~ Least acidic
~ Neutral
= Most acidic
~ Basic
}

A less concentrated sugar solution tastes ________.
{
~ Bitter
= Less sweet
~ Neutral
~ Sweet
}

The concentration of H⁺ ions ________ in a solution becoming less acidic.
{
= Decreases
~ Increases
~ Stays the same
~ Doubles
}

The solution with the highest volume and the same H⁺ ions is the ________.
{
~ Most acidic
= Least acidic
~ Neutral
~ Most basic
}

//Numericals



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Higher concentration of H⁺ ions in a solution -> Results in higher acidity
=Concentration of OH⁻ ions in a solution -> Defines the basic strength of the solution
=Dilution of an acidic solution -> Reduces the acidic strength of the solution
=A solution with fewer H⁺ ions in a large volume -> Indicates a solution is least acidic
=Adding OH⁻ ions to a solution -> Reduces the acidic strength
=The concentration of H⁺ ions decreases in a solution -> Indicates a solution is less acidic
=A sugar solution diluted with more water -> Reduces the sweetness of sugar solution
=Higher volume of solution with the same H⁺ ions -> Indicates a solution is less concentrated
=Increasing the concentration of OH⁻ ions -> Increases the basicity of the solution
}


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