Question 4 ol 7 Sapling Learning For the following reaction between Mohrs salt (

Question

Question 4 ol 7 Sapling Learning For the following reaction between Mohrs salt (ron as Feso, NH4 so. and dichromate as Crzor), determin the volume (in milliliters) of a o 140 M solution of e reaction is that is needed to fuly react with 0.0300 L 140 M potassium (The shown in its ionic form in the d te. presence of a strong acid.) Fe 14H 7H,0 Mohr's salt volume fully the same reaction, what volume (in of 0,140 Mpotassium dichromate is required to react with L M solution of Mohr's salt? potassium dichromate volume a mL. O Previous ® Give up s view solution 2 chock Answer 0 Next HExit

Explanation / Answer

for first part first calculate the moles of dichromate

moles of dichromate = 0.14 x 0.03 = 0.0042

1 mole dichromate reacts with 6 moles of mohrs salt

0.0042 moles dichromate reacts with 0.0042 x 6 = 0.0252 moles mohrs salt.

volume of mohrs salt = 0.0252 / 0.14

volume of mohrs salt = 0.18 L

volume of mohrs salt = 180 mL

now second part.

moles of mohrs salt = 0.14 x 0.03 = 0.0042 moles

6 moles mohrs salt reacts with 1 mole dichromate

0.0042 moles mohrs salt reacts with 0.0042 x 1 / 6 = 0.0007 moles

volume of mohrs salt = 0.0007 / 0.14 = 0.005 L

volume of mohrs salt = 5.0 mL

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