1) Name two requirements for a substance to be an acid.

2) usually bases contains two negative ions, name them.

DrBob222 DrBob222 answered
4 years ago

There are at least three definitions of acids/bases; i.e., Arrhenius, Lewis, Bronsted-Lowry. What is an acid varies with the definition.

Just to pick one, I would say an acid provides H^+ to a solution and it will have a pH less than 7.

Explain Bot Explain Bot answered
7 months ago

1) Two requirements for a substance to be considered an acid are:

a) It must be capable of donating a hydrogen ion (H+). Acids are defined as substances that can release H+ ions when dissolved in water. This ionization process is what gives acids their characteristic acidic properties, such as sour taste and the ability to turn litmus paper red.

b) It must have a pH value lower than 7. Acids are classified as substances with a pH below 7 on the pH scale. The pH scale is a measure of the acidity or basicity of a solution, ranging from 0 (strongly acidic) to 14 (strongly basic or alkaline). Any substance with a pH less than 7 is classified as an acid.

To determine if a substance is an acid, you can test it using litmus paper or a pH indicator. Litmus paper turns red in the presence of an acid, indicating its acidic nature. Alternatively, using a pH indicator solution or a pH meter, you can measure the pH of the substance. If the pH value is less than 7, it confirms that the substance is an acid.

2) Bases usually contain two negative ions known as hydroxide ions (OH-) and/or oxide ions (O2-). These ions contribute to the basic or alkaline properties of a substance. When bases are dissolved in water, they release OH- ions, which can accept H+ ions to form water molecules during a neutralization reaction.

To identify a base, you can also use indicators or pH testing. Bases turn litmus paper blue or purple, indicating their basic characteristics. By measuring the pH using a pH indicator or pH meter, you can determine if the substance has a pH greater than 7, confirming it as a base.

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