# Hl Chemistry Mid-term Form (1)

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Quizzes Created: 2 | Total Attempts: 114
Questions: 46 | Attempts: 66

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### In the graph below, the rate of reaction at point A is the  ________ (slowest, fastest, zero) because the amount of reactants particles is ________ (maximum, minimum, zero).

fastest,faster
maximum,max
Explanation
At point A on the graph, the rate of reaction is the fastest because the slope of the curve is steepest at this point, indicating a rapid change in the concentration of reactants. The amount of reactant particles is at its maximum at point A, as indicated by the high concentration of reactants, which allows for more frequent collisions and a higher likelihood of successful reactions. Therefore, the rate of reaction at point A is the fastest and the amount of reactant particles is at its maximum.

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• 17.

### In the graph below, the rate of reaction at point C is the  ________ (slowest, fastest, zero) because the amount of reactants particles is ________ (maximum, minimum, zero).

zero,0
zero,0
Explanation
At point C on the graph, the rate of reaction is zero because there is no change in the amount of reactant particles. This means that there is no reaction occurring and the rate is effectively zero.

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• 18.

### What is the energy change for this reaction? ________ KJ/mol

-97
Explanation
The energy change for this reaction is -97 KJ/mol. This indicates that the reaction is exothermic, as the energy of the products is lower than the energy of the reactants. The negative sign indicates that the reaction releases energy.

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• 19.

### What is the bond energy of the C=O bond? ________

841,+841
Explanation
The bond energy of the C=O bond is 841 kJ/mol. This means that it requires 841 kJ of energy to break one mole of C=O bonds. The positive sign indicates that this is an endothermic process, meaning that energy is absorbed when the bond is broken. Therefore, the correct answer is 841,+841.

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• 20.

### ________

zinc ethanoate
• 21.

### ________ + ________

calcium ethanoate,water
calcium ethanoate,water
Explanation
The answer is repeating the combination of "calcium ethanoate" and "water" twice.

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• 22.

LiNO3,lino3
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### Which one do you like?

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The question asks for a personal preference, so the correct answer will vary depending on the individual. In this case, the person prefers option B.

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### Which one do you like?

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The question asks for a personal preference between four options: A, B, C, and D. The correct answer is B, indicating that the person prefers option B out of the given choices.

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### For the salt (Y)  prepared below, the solid X is ________ (soluble , insoluble) and the salt Y is ________ (soluble , insoluble).

insoluble
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Explanation
The solid X is insoluble because it does not dissolve in the given solution. On the other hand, the salt Y is soluble because it dissolves in the given solution.

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• 34.

### State the colour of each indicator with Ammonia: 1- Universal indicator ________ 2- Methyl Orange ________

blue
yellow
Explanation
The universal indicator turns blue in the presence of ammonia, indicating a high pH. Methyl Orange, on the other hand, turns yellow in the presence of ammonia, indicating a lower pH.

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The given question asks for the preferred option among A, B, C, and D. The answer provided states that the preferred option is C.

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The given question asks for a preference among options A, B, C, and D. The answer states that the preferred option is B.

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