X and Y are acidic solutions. X has a pH of 2 and Y has a pH of 4. Which of the following statements about hydrogen ion concentrations of X and Y is correct?
 
1. Y has a hydrogen ion concentration 2 times greater than X.
2. X has a hydrogen ion concentration 100 times greater than Y.
3. X has a hydrogen ion concentration 4 times greater than Y
4. Y has a hydrogen ion concentration 100 times greater than X
Subtopic:  pH calculation |
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At 4oC , ionic product of water (K\(\omega\)) is 10-16 . At this temperature, a solution has pH = 7.5 . The nature of this solution at 4oC will be 

1. Acidic 

2. Alkaline 

3. Neutral

4. Cannot be predicted 

Subtopic:  pH calculation |
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pH of a saturated solution of CaOH2 is 9. The solubility product Ksp of CaOH2 is:

1. 0.5×10-10

2. 0.5×10-15

3. 0.25×10-10

4. 0.125×10-15

Subtopic:  pH calculation |
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