Four samples A, B, C and D change the colour of pH paper or solution to Green, Reddish-pink, Blue and Orange. Their pH was recorded as 7, 2, 10.5 &6 respectively. Which of the samples has the highest amount of Hydrogen ion concentration? Arrange the four samples in the decreasing order of their pH.
Answers
Answer:
) D is neutral, as its pH value is equal to 7
b) C is strongly alkaline, as its pH value is 11.
c) B is strongly acidic, as its pH value is equal to 1
d) A is weakly acidic, as its pH value is equal to 4 and more than solution B.
e) E is weakly alkaline, as its pH value is equal to 9 and less than C.
pH value of the given solution in increasing order of hydrogen-ion concentration: 11<9<7<4<1
Answer:
sample B has the highest amount of hydrogen ion concentration.
decreasing order of pH : sample C > A > D> B
Explanation:
pH is define as the logarithmic value of Hydrogen ion concentration. lower the pH, more the amount of hydrogen ion present in the solution, and lesser the hydroxide ion.
Out of the four samples given, sample B has the lowest pH that means it has the highest hydrogen ion concentration.
pH = -log[H⁺]
2 = -log[H⁺]
[H⁺] = 10⁻² = 0.001
The decreasing pH is 10.5 > 7 > 6 > 2 which means sample C > A > D > B
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