What is the pH of a neutral aqueous solution at 25 degrees Celsius?
Answer and explanation
Correct answer: C. 7, where hydrogen and hydroxide ions are equal in number
- Step 1: pH measures hydrogen ion concentration on a scale around 0 to 14.
- Step 2: At 25 degrees the neutral point is 7, where H+ and OH- are balanced.
Answer
7.
Why not the others: 0 and 1 are strongly acidic, and 14 is strongly basic.
Practise more Knowledge Areas.
Free questions with an explanation for every one, and full timed Examen Admisión UNMSM (Peru) mock tests.
More Knowledge Areas questions
- In which cell structure does photosynthesis take place?
- In a DNA double helix, which base pairs with adenine?
- Two heterozygous pea plants (Aa) are crossed and A is completely dominant. What is the expected ratio of dominant to recessive phenotypes am…
- What is the result of one round of mitosis in a diploid cell?
- Colour blindness is carried on the X chromosome as a recessive allele. A carrier woman and a man with normal vision have children. What is t…
- How many moles are there in 36 g of water (molar mass 18 g/mol)?