Question

what happens when excess base is diluted into the water? what happens to the present concentration of OH- ions?

Please give answers in brief​

Answer 1

Answer:

The concentration of (OH − ) Hydroxide ions increases when the excessive base is added to the solution of Sodium Hydroxide as the base itself dissociates to give out OH −ions which increases their concentration per unit volume.

Answer 2

The concentration of (OH −) Hydroxide ions increases when the excessive base is added to the solution.

• Acids and bases dissolve in water and, because they increase the concentration of either protons or hydroxide ions.
• They suppress water self-ionization
• Base, when dissolved in water, produces OH – ion.
• When an acidic solution is diluted with water, the concentration of H + ions decreases.
• Hence the pH of the solution increases towards 7.
• When an alkali is diluted with water, the concentration of OH – ions decreases.
• The pH of the alkali fall towards 7.
• The self-ionization of water is the chemical reaction in which two water molecules react to produce a hydronium and a hydroxide ion.
• The reaction is also known as the autoionization or autodissociation of water.
• It is a evidence for amphoteric nature of water.
• In pure water, a very small fraction of water molecules donate protons to other water molecules to form hydronium ions and hydroxide ions.
• The ionization constant, dissociation constant, self-ionization constant, water ion-product constant or ionic product of water is symbolized by Kw.
• A base is an ion or molecule that is able to accept a hydrogen ion from an acid.
• An acid is a molecule that can donate an H+ ion.
• pH scale is a commonly used scale to measure the acidity or the basicity of a substance.
• The values on the pH scale range from 0 to 14.
• The acidic substances have pH values ranging from 1 to 7.
• The basic substance have pH value from 7 to 14.
• Since the scale is based on pH values, it is logarithmic.

#SPJ3