The pH of the solution for vinegar with 5 .0% ( w/v ) acetic acid in water has to be calculated. Concept introduction: An equilibrium constant ( K ) is the ratio of concentration of products and reactants raised to appropriate stoichiometric coefficient at equlibrium. For the general base B, B ( aq ) +H 2 O ( l ) ⇌ BH + ( aq ) +OH - ( aq ) The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows: K b = [ BH + ] [ OH - ] [ B ] ( 1 ) An equilibrium constant ( K ) with subscript b indicate that it is an equilibrium constant of an base in water. Base - dissociation constants can be expressed as pK b values, pK b = -log K b and 10 - pK b = K b Percent dissociation can be calculated by using following formula, Percent dissociated = dissociation initial ×100 The K b value is calculating by using following formula, K w = K a × K b The molarity is calculated by using following formula, Molarity (M) = Moles of solute Volume of solution in liter
The pH of the solution for vinegar with 5 .0% ( w/v ) acetic acid in water has to be calculated. Concept introduction: An equilibrium constant ( K ) is the ratio of concentration of products and reactants raised to appropriate stoichiometric coefficient at equlibrium. For the general base B, B ( aq ) +H 2 O ( l ) ⇌ BH + ( aq ) +OH - ( aq ) The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows: K b = [ BH + ] [ OH - ] [ B ] ( 1 ) An equilibrium constant ( K ) with subscript b indicate that it is an equilibrium constant of an base in water. Base - dissociation constants can be expressed as pK b values, pK b = -log K b and 10 - pK b = K b Percent dissociation can be calculated by using following formula, Percent dissociated = dissociation initial ×100 The K b value is calculating by using following formula, K w = K a × K b The molarity is calculated by using following formula, Molarity (M) = Moles of solute Volume of solution in liter
Definition Definition Number that is expressed before molecules, ions, and atoms such that it balances out the number of components present on either section of the equation in a chemical reaction. Stoichiometric coefficients can be a fraction or a whole number and are useful in determining the mole ratio among the reactants and products. In any equalized chemical equation, the number of components on either side of the equation will be the same.
Chapter 18, Problem 18.163P
Interpretation Introduction
Interpretation:
The pH of the solution for vinegar with 5.0% (w/v) acetic acid in water has to be calculated.
Concept introduction:
An equilibrium constant(K) is the ratio of concentration of products and reactants raised to appropriate stoichiometric coefficient at equlibrium.
For the general base B,
B(aq)+H2O(l)⇌ BH+(aq)+OH-(aq)
The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows:
Kb=[BH+][OH-][B](1)
An equilibrium constant (K) with subscript b indicate that it is an equilibrium constant of an base in water.
Base - dissociation constants can be expressed as pKb values,pKb = -log Kb and10 - pKb = Kb
Percent dissociation can be calculated by using following formula,
Percent dissociated = dissociationinitial×100
The Kb value is calculating by using following formula,
Kw = Ka × Kb
The molarity is calculated by using following formula,
Topic: Photochemistry and Photophysics of Supramolecules
Two cations that exchange an electron in an interface, the exchange density is worth 1.39 mA/cm2 and the current density is worth 15 mA/cm2 at 25°C. If the overvoltage is 0.14 V, calculate the reaction rate and symmetry factor. Data: R = 8,314 J mol-1 k-1: F = 96500 C
With the help of the Tafel line, it is estimated that the interchange density of the VO2+/VO2+ system on the carbon paper has a value of 3 mA cm-2. Calculate a) the current density if the voltage has a value of 1.6 mV and the temperature is 25°C. b) the beta value of the anódico process if the Tafel pendulum is 0.6 V at 25°C. Data: R = 8.314 JK-1mol-1, y F = 96485 C mol-1.
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