What is the final acetate ion concentration when 69. g Ba(C2H3O2)2 is dissolved in enough water to make 970. mL of solution? The molar mass of Ba(C2H3O2)2 is 255.415 g/mol. 0.28 M
0.64 M
0.91 M
0.20 M
0.56 M
1 answer:
Answer:
<em><u> </u></em>
Explanation:
<u />
<u>1. Dissociation equation</u>
<u />
Assuming 100% dissociation, the equation is:
Ba(C₂H₃O₂)₂ → Ba²⁺ + 2C₂H₃O₂⁻ ↑
acetate ions
<u>2. Molarity</u>
<u />
Calculate the molarity, M, of the solution:
n = mass in grams / molar mass
n = 69.g / 255.415g/mol = 0.27015 mol
M = 0.27015mol / 0.970liter = 0.27850 mol/liter ≈ 0.28M
<u>3. Acetate ions</u>
From the chemical equation, 1 mol of dissolved Ba(C₂H₃O₂)₂ produces 2 acetate ions in solution.
Thus, 0.28 mol/liter × 2 = 0.56 mol/liter = 0.56M ← answer
You might be interested in
<h2><em><u>ᎪꪀsωꫀᏒ</u></em></h2>
➪Methane (CH4) is oxidized with molecu- lar oxygen (O2) to carbon dioxide (CO2).
I believe the answer is C which is supporting a variety of organisms, cleaning oil from oceans, producing oxygen.
<span>Evaporation and condensation is caused by heat. That is how they are related. Heat causes the liquid to evaporate and float into the atmosphere which causes the formation of clouds. Hope this helped. Have a great day!</span>
Answer:
Explanation:
Silver chloride precipitates out because it has a low value of Ksp.
The standard enthalpy change of a reaction is positive thus endothermic. The standard enthalpy change of a reaction is negative thus exothermic. Hope it helped!