The diagram shows a Boltzmann distribution curve. The axes are not labelled. Points $$$X$$$ and $$$Y$$$ are points on the vertical axis. What is represented by both points X and Y ?

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_w24_qp_11 Year：2024 Question No：15

Answer:

Knowledge points:

7.2.1 state the names and formulae of the common acids, limited to hydrochloric acid, HC/, sulfuric acid, ethanoic acid,

7.2.10 select suitable indicators for acid-alkali titrations, given appropriate data

7.2.2 state the names and formulae of the common alkalis, limited to sodium hydroxide, NaOH, potassium hydroxide, KOH, ammonia,

7.2.3 describe the Brønsted–Lowry theory of acids and bases

7.2.4 describe strong acids and strong bases as fully dissociated in aqueous solution and weak acids and weak bases as partially dissociated in aqueous solution

7.2.5 appreciate that water has pH of 7, acid solutions pH of below 7 and alkaline solutions pH of above 7

7.2.6 explain qualitatively the differences in behaviour between strong and weak acids including the reaction with a reactive metal and difference in pH values by use of a pH meter, universal indicator or conductivity

7.2.7 understand that neutralisation reactions occur when

7.2.8 understand that salts are formed in neutralisation reactions

7.2.9 sketch the pH titration curves of titrations using combinations of strong and weak acids with strong and weak alkalis

8.1.1 explain and use the term rate of reaction, frequency of collisions, effective collisions and non-effective collisions

8.1.2 explain qualitatively, in terms of frequency of effective collisions, the effect of concentration and pressure changes on the rate of a reaction

The diagram shows a Boltzmann distribution curve. The axes are not labelled. Points $$\(X\)$$ and $$\(Y\)$$ are points on the vertical axis. What is represented by both points X and Y ?

Answer:

Knowledge points:

Solution:

The diagram shows a Boltzmann distribution curve. The axes are not labelled. Points $$\(X\)$$ and $$\(Y\)$$ are points on the vertical axis. What is represented by both points X and Y ?

Answer:

Knowledge points:

Solution:

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