What is the pH of half-cell Pt H2 H+?
pH=0.02950.0591=12=0.5 V.
What is the emf of the following cell Pt H2 H+?
The e.m.f of the cell pt,H2 ( 1 atm)|HA ( 0.01 )||HCL ( 1.0 M)|H2 ( 1 atm) Pt is 0.295 V.
Is Pt cathode or anode?
Because the reduction reaction occurs at the Pt electrode, it is the cathode. Conversely, the oxidation reaction occurs at the tin electrode, so it is the anode.
How do you find the pH of H2?
For it for example if my concentration was 0.1 moles per liter. All. I would do to calculate the pH is type into my calculator a negative log 0.1 and it will give me the pH the pH is. 1.
What is the formula of pH scale?
pH = −log ([H+])
pH is defined as the negative log base 10 of the hydronium concentration. The pH is a logarithmic measure of the concentration of hydrogen ions in a solution. Because pH is on a log scale that means that increasing the pH by 1 corresponds to multiplying the concentration of H+ ions by 10!
How do you calculate the pH of a cell?
At standard conditions, you can use the formula to find the pH. The formula for ph is pH = -log[H+}, so you can find the concentration of hydrogen ions by the Nearst equation. The formula above is already converted from ln to log.
What is the emf of this cell when Ni2+?
E’Ni2+/Ni) = -0.25 V E° (Au3+ / Au) = 1.50 V The emf of the voltaic cell.
What is the cell reaction for the cell Pt H2?
The cell reaction for the given cell is Pt(H2(P1))∣pH=2∣∣pH=3∣Pt(H2(P2)) where , P1=1atm and P2=1atm.
Is PT the cathode?
The electrode is prepared in an electrolyte containing (e.g., 3% platinum chloride), with the platinum as the cathode.
Why is PT used as an electrode?
Pt is a noble metal that is very stable and resistant to corrosion. Because of its stability, like Au, it is often used to make jewelry. As an electrode, it is used to oxidize organics or to generate hydrogen or reduce oxygen. You can order Pt as a wire of various diameters or foil with different thicknesses.
What is pH formula?
The measure of hydrogen ion concentration used to determine the acidity or alkalinity of a solution is known as pH. The following is the equation for calculating the pH: -log[H+] = pH. 2.
How do u calculate pH?
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity). The pH is then calculated using the expression: pH = – log [H3O+].
What is pH stand for?
potential hydrogen
pH may look like it belongs on the periodic table of elements, but it’s actually a unit of measurement. The abbreviation pH stands for potential hydrogen, and it tells us how much hydrogen is in liquids—and how active the hydrogen ion is.
How do you solve pH questions?
How To Solve pH Problems – YouTube
What is the pH of cell?
between 7.0 and 7.4
Physiologically normal intracellular pH is most commonly between 7.0 and 7.4, though there is variability between tissues (e.g., mammalian skeletal muscle tends to have a pHi of 6.8–7.1).
What is the pH of half cell PT?
Therefore the pH of half cell is 0.4991.
What will be the standard electrode potential of Ni2 +/ Ni?
What is the standard electrode potential of `Ni^(2+)|Ni` electrode? The standard EMF of the cell : <br> `Ni|N_(1)^(2+)||Cu^(2+)|Cu” is “0.59 V`. The standard reduction potential of copper electrode is `0.34 V`.
What is the emf of a cell Ni Ni2+ Au3 +/ Au?
What is the cell reaction for the cell PT?
The cell reaction for the given cell is Pt(H2(P1))∣pH=2∣∣pH=3∣Pt(H2(P2))
How do you write a cell reaction for a cell?
H2(g,1atm)+Hg2Cl2(s)→2H+(0. 5M)+2Hg(l)+2Cl−(aq) (overall cell reaction)
Why is Pt used as an electrode?
What is a cathode and anode?
The Anode is the negative or reducing electrode that releases electrons to the external circuit and oxidizes during and electrochemical reaction. The Cathode is the positive or oxidizing electrode that acquires electrons from the external circuit and is reduced during the electrochemical reaction.
Why is Pt used in cathode?
Pt is used as the catalyst for both the hydrogen oxidation reaction (HOR) occurring at the anode and the oxygen reduction reaction (ORR) at the cathode. Usually, the Pt catalyst takes the form of small particles on the surface of somewhat larger carbon particles that act as a support.
What is the role of Pt wire in hydrogen electrode?
Platinum is used in the Standard Hydrogen Electrode due to the following reasons: Platinum is a relatively inert metal which does not corrode easily. Platinum has catalytic qualities which promote the proton reduction reaction.
How do you find H+ from pH without a calculator?
Calculate [H+] from pH – YouTube