Page 12 of 14 BASOA Acids, Bases, and the plt Scale A student was handed three s

Question

Page 12 of 14 BASOA Acids, Bases, and the plt Scale A student was handed three solutions, labeled 1, 2, and 3. She contained 0.1M HNO3, another contained o.1M KOH, and the thirt one thiynol blue. When she mixed equal amount of two of the solutions she got dt I mixed with 2 gave a blue solution. I mixed with 3 gave a colorless solution. oowing res a red solution. Identify the solutions. was told that 2 mixed with 3 gave Solution 3 was Solution 2 was Solution I was She then mixed equal amounts of all three solutions. What color did she get? Explain. Ceramic Plate used for sample testing.

Explanation / Answer

1+2 = blue solution, there is base present since thymol changes blue in basic media

1+3 = colorless --> neutralizaiton, pH = 7

2+3 = red solution --> this is acid + water

then... clearly

3 ---> acid

1 --> base

2 --> water

if she mixes equal amounts of three

since KOH = HNO3

there will be neutralization

pH = 7, neutral color will be transparent

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