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www.sciencebuddies.org/.../references/acids-bases-the-ph-scale

In pure water, there are an equal number of hydrogen ions and hydroxide ions. The solution is neither acidic or basic. An acid is a substance that donates hydrogen ions. Because of this, when an acid is dissolved in water, the balance between hydrogen ions and hydroxide ions is shifted.

www.rsc.org/.../what-makes-a-substance-acidic?cmpid=CMP00005296

What makes a substance acidic? ... Pure ethanoic acid is an unpleasant corrosive substance, made even more so when ethanoic anhydride is added to ensure it is dry. For this reason it should only be used at this level in a demonstration. If the ethanoic acid is completely dry, it will turn the indicator paper an unusual colour, often purplish, a ...

www.answers.com/Q/What_makes_substances_acidic

Substances curd when kept out become acidic because of acidic bacteria or fungus .Three acidic polysaccharide (AP) fractions and the prostaglandin-like substances (PLS) isolated fromP. acnes were ...

www.answers.com/Q/What_makes_a_substance_an_acid

Acid substances are materials that release hydrogen ions and that have a pH of less than 7. Acids may be highly corrosive, such as sulfuric acid (H2SO4) or not, such as vinegar.

www.reference.com/science/acidic-substances-c88bfde4e8fb7b1

Above seven means the substance is a base, or alkaline, substance. Battery acid is ranked as one of the most acidic substances because is has a pH value of zero. Concentrated sulfuric acid is also very acidic, being listed as one. Lemon juice and vinegar are also very acidic, but not as much so since they are ranked at a level two pH rating ...

www2.nau.edu/lrm22/lessons/acids_and_bases/acids_and_bases.html

Acids, Bases, and the pH Scale. The terms acid and base describe chemical characteristics of many substances that we use daily.Acidic things taste sour. Basic or alkaline things taste soapy. Strong acids are corrosive and strong bases are caustic; both can cause severe skin damage that feels like a burn.

www.quora.com/What-are-some-examples-of-acidic-substances

An acidic substance is any substance with a pH of less than 7, the smaller the number the more acidic it is. It all has to do with hydrogen ions (abbreviated with the chemical symbol H+). In water (H2O), a small number of the molecules dissociate ...

en.wikipedia.org/wiki/Acid

Thus, an Arrhenius acid can also be described as a substance that increases the concentration of hydronium ions when added to water. Examples include molecular substances such as HCl and acetic acid. An Arrhenius base, on the other hand, is a substance which increases the concentration of hydroxide (OH −) ions when dissolved in water.

www.answers.com/Q/What_makes_a_substance_an_acid_or_a_base

Just any acid and any base won't necessarily "make anything". Acids and Bases are measured on the pH scale which ranges from 1 to 15, 1 being acidic, and is a non-linear, logarithmic scale meaning ...

sciencing.com/alkaline-substance-5073350.html

Today, alkaline is often defined as being the opposite of acidic, also called basic. However, scientifically speaking, alkaline has a much narrower definition, for it refers to substances derived from two columns or groups on the Periodic Chart and the various salts and compounds that can be formed from these elements.