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Maurinko [17]
3 years ago
9

If the ph of a solution is decreased from ph 8 to ph 6 it means that the

Chemistry
2 answers:
dimaraw [331]3 years ago
8 0

If the pH of a solution is decreased from pH 8 to pH 6 it means that the concentration of hydrogen ions in the solution has been increased while the concentration of OH ions have been decreased.

<h2>Further Explanation: </h2><h3>pH and pOH </h3>
  • pH and pOH measures the acidity or alkalinity of a substance.
  • pH is the measure hydrogen ion concentration in a substance while pOH measures the concentration of hydroxyl ions.
<h3>Acids and bases </h3><h3>Acids </h3>
  • Acids are substances that react with bases to form salt and water as the only products.
  • Acids have a pH less than 7, with strong acids having a pH range of 1-3 while weak acids have a pH range of 4-6.
  • The pOH of acids on the other hand is greater than 7.
<h3>Bases</h3>
  • Bases are substances that react with acids to form salt and water as the only product.
  • Bases have a pH greater than 7, with strong bases having a pH range of 12-14 and weak bases having a pH range of 8-11.
  • Bases have a pOH less than 7.
<h3>Calculation of pH and pOH </h3>
  • pH is calculated as the negative logarithm of hydrogen ion concentration.

That is;

pH = -Log [H+]

  • pOH on the other hand is calculated as the negative logarithm of hydroxyl ion concentration.

That is;

pOH =-Log[OH-]

Additionally;

pH + pOH = 14

Keywords: Acids, bases, pH, pOH

<h3>Learn more about:</h3>
  • pH :brainly.com/question/10951922
  • pOH : brainly.com/question/10951922
  • Example of a question on pH: brainly.com/question/10951922
  • Example of a question on pOH: brainly.com/question/10951922

Level; High school

Subject: Chemistry

Topic: Acids and bases

Sub-topic; pH and pOH

saw5 [17]3 years ago
5 0

Explanation:

Relation between pH and concentration of hydrogen ions is as follows.

                  pH = -log [H^{+}]

So, it means that an increase in the value of pH will show that there occurs a decrease in concentration of hydrogen ions.

Therefore, the solution becomes basic in nature.

On the other hand, a decrease in the value of pH will show that there occurs an increase in the concentration of hydrogen ions.

Therefore, the solution becomes more acidic in nature.

Hence, if the pH of a solution is decreased from pH 8 to pH 6 it means that the concentration of hydrogen ions has increased in the solution.

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Pete Gannett

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Seems to be an ideal gas law question. The relevant equation is:

PV = nRT

where P is the pressure in atmospheres, V is the volume in liters, n is the number of moles of gas, R is the gas constant (0.082 atm-L/mole-deg K), and T is temperature in Kelvins. STP means standard temperature and pressure and this is taken as 1 atm and 0º C or 273 K.

To calculate the number of molecules we will use the constant 6.023 * 10^23 molecules/mole and, therefore, we will need to know the number of moles (n). So, first we’ll rearrange the gas law equation, isolating ’n’ and then put the numbers in.

n = PV/RT = 1 * 1 / (0.082)(273) = 0.0447 moles

So, to calculate the number of molecules, multiple this by the number of molecules in a mole and you get:

# molecules of nitrogen in 1 Liter at STP = 6.023 * 10^23 molecules/mole * 0.0447 moles = 2.6905 * 10^22 molecules

Note, it does not matter what the gas is.

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