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lidiya [134]
3 years ago
8

A reaction is first order if:_________ a) the coefficients in the chemical reaction are all 1's. b) the order with respect to on

e reactant is 1. c) the overall reaction order is 1. d) the reaction proceeds quickly to products.
Chemistry
1 answer:
victus00 [196]3 years ago
4 0

Answer:

c) the overall reaction order is 1.

Explanation:

The order of reaction is defined as the order in which the particles of the different reagents commission to produce a product. Additionally, the total order of reaction is the sum of the exponents of the concentrations in the law of the reaction rate, since the order depends on the reagent that is analyzed. The order of the reactions is determined experimentally.

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When 1.95 g of co(no3)2 is dissolved in 0.350 l of 0.220 m koh, what are [ co2+], [ co(oh)42−], and [ oh−] if kf of co(oh)42− =
Airida [17]
Mass of Co(NO₃)₂ = 1.95 g
V KOH = 0.350 L
[KOH] = 0.220 M
Kf = 5.0 x 10⁹
molar mass of Co(NO₃)₂ = 182.943 g/mol
so [Co(NO₃)₂] = 1.95 / (0.350 * 182.943) = 0.03045 M
[Co²⁺] = 0.03045 M
[OH⁻] = 0.22 M
chemical reaction:
             Co²⁺(aq) + 4 OH⁻    ⇄      Co(OH)₄²⁻
I (M)      0.03045      0.22                   0
C (M)   - 0.03045   - 4 (0.03045)      0.03045
E (M)       - x         0.22 - 4(0.03045)   0.03045
                              = 0.0982
Kf  = [Co(OH)₄²⁻] / [Co⁺²][OH⁻]⁴
5.0 x 10⁹ = (0.03045) / x (0.0982)⁴
x = 6.5489 x 10⁻⁸
at equilibrium:
[Co²⁺] = 6.54 x 10⁻⁸
[OH⁻] = 0.0982 M
[Co(OH)₄²⁻] = 0.03045 M



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