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aniked [119]
3 years ago
14

Choose all the answers that apply. Which of the following will decrease reaction rate? increase in pressure. decrease temperatur

e. increase concentration. decrease concentration
Chemistry
2 answers:
zloy xaker [14]3 years ago
4 0
Decrease temperature and decrease of concentration will decrease reaction rate, because less molecules will be able to react.
Oksana_A [137]3 years ago
4 0

Answer:

Decrease temperature and decrease of concentration will decrease reaction rate, because less molecules will be able to react.

Explanation:

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Which of the following are not single-displacement reactions?
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\boxed{\text{B and C }}

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In a single-displacement reaction, one element exchanges partners with another element in a compound.

\textbf{A. } \rm Fe + 2HCl \longrightarrow FeCl_2 + H_2

This is a single-displacement reaction, because the element Fe exchanges partners with H in HCl.

\textbf{B. } \rm KOH + HNO_3 \longrightarrow H_2O + KNO_3

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This is a double displacement reaction in which the K⁺ and H⁺ cations change partners with the anions.

\textbf{C. } \rm Na_2S + 2HCl \longrightarrow 2NaCl + H_2S

This is not a single-displacement reaction. It is another double displacement reaction, in which the Na⁺ and H⁺ cations change partners with the anions.

\textbf{D. } \rm Ca + 2HOH \longrightarrow Ca(OH)_2 + H_2

This is a single-displacement reaction, because the element Ca exchanges partners with H in H₂O.

\boxed{\textbf{B and C }} are not single-displacement reactions.

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