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Alkali vs. Alkaline: What's the Difference?

Edited by Huma Saeed || By Sawaira Riaz || Published on November 29, 2023
Alkali refers to a base that dissolves in water, whereas alkaline describes a solution with a pH greater than 7.

Key Differences

Alkali substances are specific bases that can dissolve in water, forming hydroxide ions. In contrast, alkaline refers to the property of a solution that contains dissolved alkali substances, resulting in a pH above 7.
Sawaira Riaz
Nov 29, 2023
Alkalis are often metal hydroxides like sodium hydroxide, exhibiting distinctive properties such as soapiness in solution. Alkaline, however, is an adjective describing any solution that exhibits basicity, like sea water, which becomes alkaline due to dissolved minerals.
Sawaira Riaz
Nov 29, 2023
The term alkali also encompasses elements in the alkali metal group of the periodic table, known for their reactivity with water. Alkaline conditions imply the presence of these or other basic substances in a solution, influencing its chemical behavior.
Huma Saeed
Nov 29, 2023
Alkali substances can be naturally occurring, such as potassium hydroxide in wood ash. Alkaline solutions, like many natural waters, owe their character to the presence of dissolved alkali substances.
Harlon Moss
Nov 29, 2023
Usage of alkali is often in industrial and chemical contexts for reactions, cleaning, or manufacturing. Alkaline environments are significant in biology and environmental science, impacting organism survival and chemical reactions.
Aimie Carlson
Nov 29, 2023
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Comparison Chart

Definition

A base that dissolves in water
A solution with a pH above 7
Sawaira Riaz
Nov 29, 2023

Usage in Grammar

Used as a noun
Used as an adjective
Sawaira Riaz
Nov 29, 2023

Examples

Sodium hydroxide, potassium hydroxide
Alkaline water, alkaline soil
Sawaira Riaz
Nov 29, 2023

Context of Use

Chemistry, specifically bases
Describing pH levels of solutions
Harlon Moss
Nov 29, 2023

Relation to Water

Reacts with water to form solutions
Refers to the pH nature of the solution
Aimie Carlson
Nov 29, 2023
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Alkali and Alkaline Definitions

Alkali

A substance forming hydroxide ions (OH-) in water.
Lye, a strong alkali, is used in drain cleaners.
Janet White
Nov 16, 2023

Alkaline

Capable of neutralizing acids.
Alkaline substances are used to balance the pH in swimming pools.
Huma Saeed
Nov 16, 2023

Alkali

A basic, ionic salt of an alkali metal.
Baking soda contains an alkali that neutralizes acids.
Sawaira Riaz
Nov 16, 2023

Alkaline

Opposite of acidic in terms of pH scale.
The alkaline solution turned the litmus paper blue.
Sawaira Riaz
Nov 16, 2023

Alkali

A water-soluble base.
Sodium hydroxide is a common alkali used in soap making.
Sawaira Riaz
Nov 16, 2023

Alkaline

A solution where hydroxide ions (OH-) predominate.
The alkaline nature of the soap helps in effective cleaning.
Sawaira Riaz
Nov 16, 2023

Alkali

A member of the alkali metals group.
Potassium, an alkali metal, reacts vigorously with water.
Harlon Moss
Nov 16, 2023

Alkaline

Characterized by the presence of an alkali.
Alkaline water is often consumed for its health benefits.
Janet White
Nov 16, 2023

Alkali

A compound that neutralizes acids.
The alkali in antacids helps relieve stomach acidity.
Sawaira Riaz
Nov 16, 2023

Alkaline

Of, relating to, or containing an alkali.
Sawaira Riaz
Nov 15, 2023

Alkali

A carbonate or hydroxide of an alkali metal, the aqueous solution of which is bitter, slippery, caustic, and characteristically basic in reactions.
Sawaira Riaz
Nov 15, 2023

Alkaline

Having a pH greater than 7.
Sawaira Riaz
Nov 15, 2023

Alkali

Any of various soluble mineral salts found in natural water and arid soils.
Sawaira Riaz
Nov 15, 2023

Alkaline

Having a relatively low concentration of hydrogen ions.
Sawaira Riaz
Nov 15, 2023

Alkaline

Of or relating to a common disposable battery made of zinc and manganese dioxide.
Sawaira Riaz
Nov 15, 2023

Alkaline

Of, or relating to an alkali, one of a class of caustic bases.
Sawaira Riaz
Nov 15, 2023

Alkaline

(chemistry) Having a pH greater than 7.
Sawaira Riaz
Nov 15, 2023

Alkaline

An alkaline battery.
Sawaira Riaz
Nov 15, 2023

Alkaline

Of or pertaining to an alkali or to alkalies; having the properties of an alkali.
Sawaira Riaz
Nov 15, 2023

Alkaline

Relating to or containing an alkali; having a pH greater than 7;
Alkaline soils derived from chalk or limestone
Sawaira Riaz
Nov 15, 2023

FAQs

Are all bases alkalis?

No, only those that dissolve in water.
Sawaira Riaz
Nov 29, 2023

How do alkalis react with acids?

They neutralize each other.
Janet White
Nov 29, 2023

What is an alkali?

A substance that forms hydroxide ions in water.
Sawaira Riaz
Nov 29, 2023

What does alkaline mean?

Describing a solution with a pH greater than 7.
Huma Saeed
Nov 29, 2023

Is seawater alkaline?

Yes, typically it is slightly alkaline.
Harlon Moss
Nov 29, 2023

Can an alkali be a gas?

No, alkalis are ionic and not gaseous.
Harlon Moss
Nov 29, 2023

Do alkalis have a pH value?

Yes, alkalis have a pH above 7.
Aimie Carlson
Nov 29, 2023

Can drinking water be alkaline?

Yes, some drinking water is naturally alkaline.
Sawaira Riaz
Nov 29, 2023

Can an acid be alkaline?

No, acids are not alkaline.
Aimie Carlson
Nov 29, 2023

Can alkalis conduct electricity?

Yes, when dissolved in water.
Harlon Moss
Nov 29, 2023

Is an alkaline diet beneficial?

Some believe it helps balance body pH.
Aimie Carlson
Nov 29, 2023

Are alkaline solutions always safe?

No, some can be corrosive.
Sawaira Riaz
Nov 29, 2023

Are alkalis found in food?

Yes, many foods contain natural alkalis.
Janet White
Nov 29, 2023

Does an alkaline pH affect health?

Yes, both high and low pH can impact health.
Aimie Carlson
Nov 29, 2023

What makes a solution alkaline?

The presence of dissolved alkali substances.
Sawaira Riaz
Nov 29, 2023

Is soap an alkali?

Yes, soap contains alkali substances.
Sawaira Riaz
Nov 29, 2023

What’s an example of an alkaline environment?

A baking soda solution.
Sawaira Riaz
Nov 29, 2023

Are all alkali metals alkalis?

Yes, when they react with water.
Aimie Carlson
Nov 29, 2023

Can soil be alkaline?

Yes, soil pH can be alkaline.
Harlon Moss
Nov 29, 2023

Do alkalis have a taste?

Yes, they often taste bitter.
Sawaira Riaz
Nov 29, 2023
About Author
Written by
Sawaira Riaz
Sawaira is a dedicated content editor at difference.wiki, where she meticulously refines articles to ensure clarity and accuracy. With a keen eye for detail, she upholds the site's commitment to delivering insightful and precise content.
Edited by
Huma Saeed
Huma is a renowned researcher acclaimed for her innovative work in Difference Wiki. Her dedication has led to key breakthroughs, establishing her prominence in academia. Her contributions continually inspire and guide her field.

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