For each of the scenarios, determine if the ionic strength of the solution would increase, decrease, or not change. ignore any effects caused by the change in volume. if a solution of hno3 were added to a solution of koh, the ionic strength of the koh solution would: a) not change b) increase c) decrease. if a dilute solution of koh were added to a solution of cacl2 (ca(oh)2(s) is formed), the ionic strength of the cacl2 solution would : a) not change b) decrease c) increase. if a dilute solution of benzoic acid were titrated with a solution of koh, the ionic strength of the benzoic acid solution would: a) not change b) decrease c) increase. if a solution of naoh were added to a solution of iron(ii) chloride, the ionic strength of the iron(ii) chloride solution would: a) not change b) decrease c) increase.

1. B) increase

2. B) decrease

3. C) increase.

4. B) decrease

Explanation:

The ionic strength (I) of a solution depends on the concentration (ci) and charge (zi) of the ion in the solution. The higher the concentration and charge of the ions the greater the ionic force.

I = 1/2 ∑

1. If a solution of HNO3 were added to a solution of KOH, the ionic strength of the KOH solution would: B) increase

Because the final solution has H+, NO3-, K+ and OH-, thus a higher concentration of ions.

2. If a dilute solution of KOH were added to a solution of CaCl2 (Ca(OH)2(s) is formed), the ionic strength of the CaCl2 solution would: B) decrease

Because the Calcium cation has a charge of +2, and the formation of Ca(OH)2(s) removes the Ca+2 in the solution and it is replace for the Potassium cation that has a charge of +1. While the concentration of Cl- remains constant. Thus, the charge of the mixture is lower than the solution of CaCl2.

3. If a dilute solution of benzoic acid were titrated with a solution of KOH, the ionic strength of the benzoic acid solution would: C) increase.

Because a solution of benzoic acid is partially ionized but after a titration all the concentration of  benzoic acid turns into benzoate and there is also K+ cations.

4.  If a solution of NaOH were added to a solution of iron(II) chloride, the ionic strength of the iron(II) chloride solution would: B) decrease

In basic conditions iron(II) chloride it oxidizes into iron(III) chloride and this precipitates as Fe(OH)3(s). Thus, the initial solution has Fe+2 which is replaced in the mixture by K+. While the concentration of Cl- remains constant. Hence the charge of the mixture is lower than the initial solution.

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation: