The volume (in mL) of 0.415M silver nitrate will be required to precipitate as silver bromide is 10.8 ml.
What is Molarity?
Molarity is defined as the amount of solute (in moles) per liter of solution.
M= n/v
It is also known as the molar concentration of a solution, It is expressed in mol/l.
where n is the number of moles
and V is the volume in liters.
We can rearrange this equation to get the number of moles:
n= M * V
The molarity of calcium bromide is 0.064 M and the volume given is 35 ml,
the moles will be n = 0.064 * 35 = 2.24 moles
2AgNO₃(aq) + CaBr₂(aq) → 2AgBr(s) + Ca(NO₃)₂(aq)
From the reaction we can see that for every 1 mole of Calcium Bromide 2 moles of Silver Nitrate are needed, so for 2.24 moles, 4.48 moles will be needed.
The molarity is given as 0.415 M and the number of moles is 4.48 so the volume required can be calculated from the above formula
V=n/M
V=4.48/0.415
V=10.8ml
Hence the volume (in mL) of 0.415M silver nitrate will be required to precipitate as silver bromide is 10.8ml.
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