Select the precipitate that forms when aqueous ammonium sulfide reacts with aqueous copper(II) nitrate.
A) CuS
B) Cu₂S
C) NH₃NO₃
D) NH₄(NO₃)₂
E) CuSO₄
Answer: A
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Chemistry Chapter 4
- A combination reaction may also be a displacement reaction. (T/F)
- The combustion of an element is always a combination reaction. (T/F)
- All combustion reactions are classified as combination reactions. (T/F)
- In a redox reaction, the oxidizing agent undergoes loss of electrons. (T/F)
- In a redox reaction, the reducing agent undergoes loss of electrons. (T/F)
- A particular reaction may be both a precipitation and an acid-base (neutralization) reaction. (T/F)
- In an acid-base (neutralization) reaction the equivalence point is the point where the indicator changes color. (T/F)
- In an acid-base (neutralization) reaction the indicator will change color at the end point. (T/F)
- Some covalent compounds dissolve in water to produce conducting solutions. (T/F)
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- Select the classification for the following reaction. CaCl₂·H₂O(s) --heat--> CaCl₂(s) + H₂O(g)
- Select the classification for the following reaction. 2H₂O₂(aq) → 2H₂O(l) + O₂(g)
- Select the classification for the following reaction. 2NaCl(l) --electricity--> 2Na(l) + Cl₂(g)
- Select the classification for the following reaction. Na₂O(s) + H₂O(l) → 2NaOH(aq)
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- Select the classification for the following reaction. KOH(aq) + HCl(aq) → KCl(aq) + H₂O(l)