Question

what is the concentration of hydrogen ion, h , present in a water sample if 100. ml of the sample requires 7.2 ml of 2.5 x 10-3 m naoh to be neutralized? start your calculation with: (naoh or h2so4

Answer 1

To find the concentration of hydrogen ions in the water sample, calculate the number of moles of NaOH used to neutralize the acidity, which equals the moles of H+ ions in the sample, then divide this by the volume of the sample in liters.

Step-by-step explanation:

To calculate the concentration of hydrogen ions in this sample, we first need to calculate the moles of sodium hydroxide (NaOH) that were used to neutralize the solution. Moles of NaOH can be determined by multiplying its volume (7.2 ml) by its concentration (2.5 x 10-3 M), and do remember to convert ml to L by dividing 7.2 by 1000.

Next, in a neutralization reaction, the amount of base (NaOH) required to neutralize the acid equals the amount of the acid (H+) in solution. Therefore, the moles of H+ ions in the 100 ml water sample are the same as the moles of NaOH used for neutralization.

Last, to find the concentration of H+ ions, we divide the amount of H+ ions by the volume of the sample in liters, which is 100 ml/1000. Use the formula [H+] = moles of H+ ions/volume to do the calculation.

Learn more about Acid-Base Neutralization