Question

Ferric Chloride, FeCl₃
Manganese Sulfate, MnSO₄
Sodium Selenite, Na₂SeO₃
Zinc Carbonate, ZnCO₃
Cupric Sulfate, CuSO₄
Potassium Iodate, KIO₃

Using the mineral sources above, and the table below, formulate a mineral premix to provide the minimum NRC recommendation for iron, manganese, copper, and iodine for 90 kg pigs. Also, determine how much dilution with a carrier is required to allow the premix to be added to the diet at 0.30%.

Mineral	Requirement(mg/kg)
iron	40
manganese	2
copper	3
iodine	0.14

Answer 1

Minral	Requirement mg/kg	Total requirement mg	Mineral source used	Total molar mass of the sources g/mol	Molar mass of the mineral desired g/mol	Mass needed of the mineral sources to satisfie the requirements * (see below for explanation)
Iron	40	40*90=3600	FeCl3	162.2	Fe= 55.85	3.6*162.2/55.85= 10.45 g of FeCl3
Manganese	2	2*90=180	MnSO4	151	Mn=54.94	1.8*151/54.94= 4.94 g MnSO4
Copper	3	3*90=270	CuSO4	159.61	Cu=63.54	2.7*159.61/63.54= 6.78 g CuSO4
Iodine	0.14	0.14*90=12.6	KIO3	214	I=126.9	0.0126*214/126.9= 0.0212 g KIO3

* Mass needed of the mineral sources to satisfie the requirements

For Fe: 3.6 g (3600 mg) of Fe are needed to satisfie the requirements for the pigs. 55.85 g of Fe are incorporated with 162.2 g of FeCl3. Then to incorporate 3.6 g of Fe Iyou will need :

55.85 g Fe -------------- 162.2 g FeCl3

3.6 g Fe--------------------- x = 3.6*162.2/55.85= 10.45 g of FeCl3

Mineral premix is composed by:

10.45 g FeCl3, 4.94 g MnSO4, 6.78g CuSO4 and 0.0212 g KIO3

Total mass is 22.19 g .

To be added as a 0.3% of a diet.

Suppose a diet is composed by 100 kg, the Premix should be 0.3 kg

Yo need to dilute the premix with 287.81 g of water (300-12.19 g)