Question

enzymes: ph
before we look at how ph can affect enzyme function, we need to understand
what ph actually is. complete this ph fact file to understand it better.
ph stands for: type here
what is the ph scale?
the ph scale is...
the equation for ph:
$$ ph = - log _ { 10 } h ^ { + } $$
the ph of pure water is:
what is an acid?
an acid is...
$$ \log _ { 10 } $$ means...
$$ h ^ { + } $$ is...
what is a base?
an base is...
label the ph scale:

Explanation:

• pH stands for: "Potential of Hydrogen" (it is a measure of the hydrogen ion concentration in a solution).
• What is the pH scale: It is a scale that measures the acidity or alkalinity of a solution. It ranges from 0 - 14. A pH of 7 is neutral. Values less than 7 are acidic and values greater than 7 are basic (alkaline).
• The pH of pure water: Pure water has a pH of 7 (it is neutral as the concentration of hydrogen ions (\(H^+\)) is equal to the concentration of hydroxide ions (\(OH^-\))).
• What is an acid: An acid is a substance that donates hydrogen ions (\(H^+\)) in a solution.
• What is a base: A base is a substance that accepts hydrogen ions (\(H^+\)) or donates hydroxide ions (\(OH^-\)) in a solution.
• \(Log_{10}\) means: It is a logarithm with base 10. In the context of pH, it is used to scale down the very small concentrations of hydrogen ions (which are often in the range of \(10^{-14}\) to \(10^{0}\) moles per liter) to a more manageable scale.
• \(H^+\) is: A hydrogen ion. In aqueous solutions, it is often represented as \(H_3O^+\) (hydronium ion) as hydrogen ions react with water molecules.

Answer:

• pH stands for: Potential of Hydrogen
• What is the pH scale: A scale (0 - 14) to measure acidity/alkalinity.
• The pH of pure water: 7
• What is an acid: Substance that donates \(H^+\)
• What is a base: Substance that accepts \(H^+\) or donates \(OH^-\)
• \(Log_{10}\) means: Logarithm with base 10
• \(H^+\) is: Hydrogen ion (often as \(H_3O^+\) in water)