Question
Sodium hydroxide has a pH of 14. What colour would universal indicator turn if it was added to sodium hydroxide? Enter answer...
Answer
4.4
(236 Votes)
Mason
Elite · Tutor for 8 years
Answer
Deep purple
Explanation
## Step 1: Understanding the pH scaleThe pH scale is used to measure the acidity or basicity of a solution. It ranges from 0 to 14, with 0 being the most acidic and 14 being the most basic (or alkaline). ## Step 2: Understanding the universal indicatorA universal indicator is a pH indicator made of a mixture of dyes that can change colors according to the pH of the solution. The color variation ranges from red (pH 1) to deep purple (pH 14). ## Step 3: Applying the knowledge to the problemThe problem states that sodium hydroxide has a pH of 14. This means it is a very strong base. When a universal indicator is added to a strong base, it turns deep purple.