Which one of the following statements is true? Both chemical and physical changes can involve a change in appearance. Neither ch
1 answer:
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Answer:
Explanation:
We are given the volumes and concentrations of two reactants, so this is a limiting reactant problem.
We know that we will need moles, so, lets assemble all the data in one place.
Cu²⁺ + 4NH₃ ⟶ Cu(NH₃)₄²⁺
V/mL: 3.00 7.00
c/mol·L⁻¹: 0.050 0.20
1. Identify the limiting reactant
(a) Calculate the moles of each reactant
(b) Calculate the moles of Cu(NH₃)₄²⁺ that can be formed from each reactant
(i) From Cu²⁺
(ii) From NH₃
NH₃ is the limiting reactant, because it forms fewer moles of the complex ion.
(c) Concentration of the complex ion