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20 lip 2023 · At 800°C, the concentration of CO2 in equilibrium with solid CaCO3 and CaO is 2.5 × 10 − 3 M. Thus K at 800°C is 2.5 × 10 − 3. (Remember that equilibrium constants are unitless.) A more complex example of this type of problem is the conversion of n-butane, an additive used to increase the volatility of gasoline, into isobutane (2-methylpropane).
- Heterogeneous Equilibria
Whatever the concentrations of \(\ce{CO}\) and...
- Heterogeneous Equilibria
22 paź 2022 · In general chemistry 1 we calculated the pH of strong acids and bases by considering them to completely dissociate, that is, undergo 100% ionization. We will now look at weak acids and bases, which do not completely dissociate, and use equilibrium constants to calculate equilibrium concentrations.
Example #2: Calculate [H 3 O +] in: (a) [OH¯] = 3.50 x 10¯ 4 M (b) [OH¯] = 8.48 x 10¯ 10 M (c) [OH¯] = 1.00 x 10¯ 7 M. Also, identify each solution as being acidic, basic, or neutral. Solution: (a) ([H 3 O +]) (3.50 x 10¯ 4) = 1.00 x 10¯ 14 [H 3 O +] = 1.00 x 10¯ 14 / 3.50 x 10¯ 4 [H 3 O +] = 2.86 x 10¯ 11 M [OH¯] > [H 3 O +] Basic. (b)
Example #1: The [OH¯] in a solution is measured to be 0.0010 M. What is the pOH? Solution: 1) Plug the [OH¯] into the pOH definition: pOH = −log 0.0010. 2) An alternate way to write this is: pOH = −log 10¯ 3. 3) Since the log of 10¯ 3 is -3, we have: pOH = −(−3) pOH = 3.00. Let's discuss significant figures and pOH.
28 maj 2024 · Calculate the mass percent of a solution that is prepared by mixing 132 grams of tin (II) sulfate and 850. grams of water. In order to calculate the mass percent of a solution, each substance that is referenced in the problem must first be classified as a solute or a solvent.
What is the value of K b for caffeine if a solution at equilibrium has [C 8 H 10 N 4 O 2] = 0.050 M, [C 8 H 10 N 4 O 2 H +] [C 8 H 10 N 4 O 2 H +] = 5.0 × × 10 −3 M, and [OH −] = 2.5 × × 10 −3 M?
Percent composition tells you which types of atoms (elements) are present in a molecule and their levels. Percent composition can also tell you about the different elements present in an ionic compound as well. The oxygen makes up 16g. Percent composition can be calculated the chemical formula of a compound, or it can be determined experimentally.
