pH 12 corresponds to which type of solution?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

pH 12 corresponds to which type of solution?

Explanation:
pH tells you how acidic or basic a solution is, and strong alkalis dissociate completely in water to produce lots of hydroxide ions. A pH of 12 means the solution is highly basic, with very low hydrogen ion activity and high hydroxide ion concentration. Since pH + pOH = 14 at room temperature, pH 12 corresponds to a pOH around 2, so [OH−] is about 0.01 M while [H+] is about 1×10−12 M. This level of basicity comes from a strong base, like NaOH or KOH, which fully dissociate to give lots of OH−. Weak bases would not raise the pH this high, and acids or neutral solutions would have pH below 7 or around 7, respectively.

pH tells you how acidic or basic a solution is, and strong alkalis dissociate completely in water to produce lots of hydroxide ions. A pH of 12 means the solution is highly basic, with very low hydrogen ion activity and high hydroxide ion concentration. Since pH + pOH = 14 at room temperature, pH 12 corresponds to a pOH around 2, so [OH−] is about 0.01 M while [H+] is about 1×10−12 M. This level of basicity comes from a strong base, like NaOH or KOH, which fully dissociate to give lots of OH−. Weak bases would not raise the pH this high, and acids or neutral solutions would have pH below 7 or around 7, respectively.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy