Question

Given: NO3- + 2Fe2+ + 3H+ --> 2Fe3+ + HNO2 + H2O Calculate the potential of a solution made by mixing 20.00mL of 0.100M Fe2+ with 7.50mL of 0.100M NO3- at a pH of 1.00. Please show work

Answer #1

Find the pH of 2.00 M HNO2 (aq) solution at 25 degrees C.
Given: HNO2 + H2O <--> NO2 + H30 Ka for HNO2 = 4.6 x
10^-4
The answer is pH=2.02. Please show me how to get this
answer.

Calculate the pH of a solution made by dissolving 8.129 g of
KNO2 into a 300.00 mL volumetric flask and adding water to the
calibration mark. Ka of HNO2 = 7.2*10^-4
**Please show your work so I can fully understand how to solve
for the pH given this info, thank you!

Calculate the pH of 0.15 M Co(NO3)2. For
[Co(OH2)6]2+, Ka = 5.0
x 10-10.
PLEASE SHOW ALL WORK.

a) Calculate the expected slope of potential E, vs. pH for an
ideal electrode to four significant figures (use ln 10, not
2.303)
b) Show that the units of the slope are V/pH-unit.
c) Estimate the real slope value expected from your E vs. pH
calibration.
We are given the equations:
E = constant2 + 2.303
(RT/zF)pHexternal
E = constant2 + (0.05916 V /
1)pHexternal
E = constant + 0.05916 ∆pH
E = constant + ß 0.05916 ∆pH
For an...

1) Describe an example of each of the following that may be
found of your kitchen: Explain how your choice falls into this
category, and if there is a chemical name or symbol for it, provide
that as well. Provide a photo of your example with your ID card in
it. a) a compound b) a heterogeneous mixture c) an element (symbol)
Moving to the Caves… Lechuguilla Caves specifically. Check out this
picture of crystals of gypsum left behind in...

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