Answer:
v₁ = 7.5mL
Explanation:
using the formula
m₁v₁=m₂v₂
given m₁=10x m₂=1x v₁=? v₂=75mL
10x × v₁ = 1x × 75mL
v₁ = 1x × 75mL / 10x
v₁ = 7.5mL
So, 7.5mL of 10x PBS should be added with 67.5mL of water
I believe it is C because Zn replaced Ag
The emf of the cell as written is calculated to be 0.014 V.
Using the Nernst equation;
Ecell = E°cell - 0.0592/n log Q
We must note that E°cell = 0 because the anode and cathode are composed of the same type of metal.
Now;
Substituting values, we have;
Ecell = 0 - 0.0592/3 log (0.50 M)/(0.10 M)
Ecell = 0.014 V
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May be radical.i am not sure buddy
A substance with a pH level of 8 has a lower level of Hydroxide (OH), not quite as basic as a pH of 12 but still basic and close to being almost neutral.
A substance with a pH of 12 has a high concentration of Hydroxide (OH) atoms, therefore, is much more basic than a pH of 8.