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Copy Of Test No 1
5 Questions
|
By Royal Academy | Updated: May 19, 2020
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1.
An experiment is set up to measure the rate of hydrolysis of methyl ethanoate, CH3COOCH3. CH3COOCH3 + H2O ⇌ CH3COOH + CH3OH The hydrolysis is very slow in neutral aqueous solution. When dilute hydrochloric acid is added, the reaction is faster. What is the function of the hydrochloric acid?
To increase the reaction rate by acting as a catalyst
To make sure that the reaction reaches equilibrium
To maintain a constant pH during the reaction
To dissolve the methyl ethanoate
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2.
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2.
For the gaseous reaction 2X(g) + Y(g) → Z(g), the rate equation is rate = k [X]
2
[Y]
0
If the pressure in the reaction vessel is doubled but the temperature remains constant, by what factor does the rate of reaction increase?
2
3
4
8
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3.
The alkaline hydrolysis of RBr, where RBr = (CH3)
3
Br, takes place in two steps: RBr → R
+
+ Br
–
SLOW R
+
+ OH
–
→ ROH FAST Which of the following rate equations is consistent with this scheme?
Rate = k [OH–]
Rate = k [RBr]
Rate = k [RBr][OH–]
Rate = k [R+][OH–]
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An experiment is set up to measure the rate of hydrolysis of ...
For the gaseous reaction 2X(g) + Y(g) → Z(g), the rate ...
The alkaline hydrolysis of RBr, where RBr = (CH3)3Br, takes ...
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