pH scale

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5 Terms

1
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What is the self-ionisation of water + its equation?

It involves one water molecule donating a hydrogen ion to another hydrogen ion, forming hydronium + hydroxide ions

H2O + H+ + OH-

2
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How do you use Kw to calculate concentration?

Use the variety of formulas, including; -log(H+), 10^-pH, 10^-pOH, pH + pOH = 14

<p>Use the variety of formulas, including; -log(H+), 10^-pH, 10^-pOH, pH + pOH = 14</p>
3
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What is the formula for pH + pOH?

pH + pOH = 14

4
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What are the pH formula?

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5
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pH neutralisation reaction steps:

1) Determine no. of moles of acid and base

2) Calculate the moles of excess H+ and OH- according to the mole ratio in the balanced chemical equation

3) add volumes of acid + base to get a total volume

4) find (H+) or (OH-) using n/v

5) Calculate pH or pOH. if pH is found, use pH=14-pOH