The pH Scale and Strong Acids (OCR A-Level Chemistry A): Quizzes

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The pH Scale and Strong Acids
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Who developed the pH scale over 100 years ago?

Søren Sørensen

What does a pH value less than 7 indicate?

Acidic solution

A change of 1 pH unit represents what change in [H+][H^+]?

10-fold change

What is the equation for pH?

pH=−log⁡[H+]pH = -\log[H^+]

How does high [H+][H^+] relate to pH?

High [H+][H^+] = low pH

Solution with pH 1 has how many times more H+H^+ than pH 4?

1000 times

For strong monobasic acids, what is true?

[H+]=[HA][H^+] = [HA]

Halving acid concentration changes pH by approximately how many units?

0.30 units

What is pH of solution with [H+]=1.0×10−3[H^+] = 1.0 \times 10^{-3} mol dm⁻³?

3.00

How many significant figures does pH 2.66 have?

2 significant figures

Explore OCR A-Level Chemistry A Revision Notes by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Model Answers by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Flashcards by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

Explore OCR A-Level Chemistry A Exam Questions by Topics

Rates of Reactions

Equilibrium

Acids, Bases and pH

Buffers and Neutralisation

Enthalpy and Entropy

Redox and Electrode Potentials

Transition Elements

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