pH & Hydrogen Ions (AQA A-Level Chemistry): Flashcards

Type of scale used for pH

Logarithmic

Change in $[\text{H}^+]$ per pH unit

Tenfold change

Formula for pH

$\text{pH} = -\log_{10} [\text{H}^+]$

Formula for $[\text{H}^+]$ from pH

$[\text{H}^+] = 10^{-\text{pH}}$

pH of neutral solution at 25°C

7.00

pH range for acidic solutions

< 7.00

pH range for alkaline solutions

7.00

Dissociation extent of strong acids

Fully dissociate

What type of acid is $\text{H}_2\text{SO}_4$?

Diprotic acid

For diprotic acids, $[\text{H}^+]$ equals?

$2 \times [\text{acid}]$