Answer:the reaction in which two water molecules produce ions is called self-ionization of water
For example
H2O➡️H+ +OH-
Explanation:
ZnO(s) + 2HCl(aq) → ZnCl2 (s) + H2O(l)
Look at the moles:
1 + 2 → 1 + 1
How much ZnO do we need to make 50g of ZnCl2? Notice it is these numbers in () and should be 1:1
(1) + 2 → (1) + 1
So we need the same number of moles, but how many moles is 50g of ZnCl2? Zn weight is 65.38g, and Cl is 35.45g. So ZnCl2 is (65.38) + (2 X 35.45)=136.28g
50g/136.28g = 0.3669 moles
What is 0.3669 moles of ZnO now?
O weighs 16g/mol, so add 65.38 + 16 = 81.38
Multiply by 0.3669 moles and get how many grams we need.
Answer:
update the answer with the questions
Explanation:
then I’ll fix question
the answer is a because the positive cations are attracted to the negative cathode. when the positive ions get to the cathode they pick up an electron and this produces normal sodium.
The ZnCl₂ solution have a molarity of 1.33 M.
Explanation:
We have the following chemical reaction:
Zn (s) + CuCl₂ (aq) → ZnCl₂ (aq) + Cu (s)
number of moles = mass / molar weight
number of moles of Zn = 25 / 65.4 = 0.38 moles
From the chemical equation we see that 1 moles of Zn produces 1 mole of ZnCl₂, so 0.38 moles of Zn will produce 0.38 moles of ZnCl₂.
molarity = number of moles / volume (L)
molarity of the ZnCl₂ solution = 0.38 / 0.285 = 1.33 M
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molarity
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