By Arrhenius definition, acids (HA) are substances that produce H + ions in aque

Question

By Arrhenius definition, acids (HA) are substances that produce H+ ions in aqueous solution (Reaction 1); bases (MOH) are substances that produce OH? ions in aqueous solution (Reaction 2). In aqueous solution, the H+ ions are highly reactive. An H+ ion binds one water molecule to form a hydronium ion (Reaction 3). When acids (HA) and bases (MOH) are mixed together, they neutralize each other by a forming salt (MA) and water (Reaction 4)

HA(aq) --> H+(aq) + A?(aq)     (Reaction 1)

MOH(aq) --> M+ + OH?(aq)     (Reaction 2)

H+(aq) + H2O(l) --> H3O+(aq)     (Reaction 3)

HA(aq) + MOH(aq) --> MA(aq) + H2O   (Reaction 4)

The pH (power of hydrogen) scale is used to quantify the acidity or basicity of a solution. It is defined as follows:

The pH scale ranges from 0 (strong acidic) to 14 (strong basic) with 7 being neutral. In other words, solutions with pH values smaller than 7 are said to be acidic, and solutions with pH values greater than 7 are said to be basic. The higher the H3O+ concentration is, the lower the pH value.

The pH meter that you will use for this project is shown in the figure below. Click the figure to link to the manual. You are strongly recommended to read the

Explanation / Answer

The second one . adding 25 ml of HCl to 500 ml of the same concentration does not affect the pH

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