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Question
In the qualitative analysis scheme for metal ions, how are the Analytical Group III cations separated from the cations of Analytical Groups IV and V?A) by addition of H2S in acidic solution, forming insoluble metal sulfides
B) by addition of (NH4)2CO3or (NH4)3PO4, forming insoluble metal carbonates or phosphates
C) by addition of H2SO4, forming insoluble metal sulfates
D) by addition of HCl, forming insoluble metal chlorides
E) by addition of H2S in basic solution, forming insoluble metal sulfides or hydroxides
Answer
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Q:
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Q:
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Q:
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Q:
If a reaction is first-order with respect to a particular reactant, when the concentration of that reactant is increased by a factor of 2, the reaction rate will _____.
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Q:
For a certain first-order reaction with the general form aA → products, the rate is 0.32 M·s-1 when the concentration of the reactant is 0.29M. What is the rate constant for this reaction?A) 0.26 s-1B) 1.1 s-1C) 0.32 s-1D) 3.1 s-1E) 3.8 s-1