What is the KW constant?
What is the KW constant?
The autoionization of liquid water produces OH− and H3O+ ions. The equilibrium constant for this reaction is called the ion-product constant of liquid water (Kw) and is defined as Kw=[H3O+][OH−]. At 25 °C, Kw is 1.01×10−14; hence pH+pOH=pKw=14.00.
How do you calculate kw in a solution?
Kw = [H+][OH-] = 1.0 X 10-14. So in any given aqueous situation, one may calculate the [H+] or [OH-] as required for any solution at 25°C. State if Acidic, Basic or Neutral.
What is the value of KW in 0.01 M Naoh?
Kw = 10^-16 at a certain temperature.
What is the concentration of H+ in a solution of 0.1 M NaOH?
8×10−5.
How do you find the pH of 0.01 m NaOH?
pOH = – log [OH-] Hence concentration of NaOH will be same as concentration of OH-.
What is the pH of 1 molar sodium hydroxide?
13
How do you calculate the pH of HCl?
Since HCl is a strong acid, it completely ionizes, and the pH of HCl in solution can be found from the concentration (molarity) of the H+ ions, by definition equal to 0.100 M. (The conjugate base of the acid, which is the chloride ion Cl–, would also have a concentration of 0.100 M.) The pH is thus –log(0.100) = 1.000.
How do you find actual concentration?
The standard formula is C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the total volume of the solution. If you have a small concentration, find the answer in parts per million (ppm) to make it easier to follow.
How do you find the initial concentration of Fe3+?
– To find the initial concentration of Fe3+, use the dilution equation: (M1V 1)/V 2 = M2, where V2 = 10 mL. [FeSCN2+] at equilibrium is determined using Beer’s Law; x is the amount of FeSCN2+ created (determined experimentally).
What is the concentration of Fe3+?
approximately 0.1 M
How do you calculate FeSCN2+ concentration?
equilibrium concentration of product
- [FeSCN2+] at equilibrium is determined using Beer’s Law; x is the amount of FeSCN2+ created (determined experimentally).
- x = [FeSCN 2+] eq =
- a.
- Use Eq.
- Find the average value of Keq, the standard deviation, and the relative error (standard deviation divided by the average).
Why is FeSCN red?
The FeSCN2+ complex that is formed as a result of reaction between iron(III) and thiocyanate ions has a very intense blood red color (or orange in dilute solution), allowing for easy detection and quantitative determination by spectrophotometry.