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5 May, 09:14

As lead chemist for a pharmaceutical manufacturing company, you need to inform the purchasing office of a supply order for the next batch of cisplatin, PtCl2 (NH3) 2. If you intend to make a 500kg batch, how many kg chlorine gas do you need to order?

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  1. 5 May, 09:37
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    mass of chlorine gas required is 118 kg.

    Explanation:

    Total mass of the drug (Cisplatin) required = 500 kg

    For the drug PtCl2 (NH3) 2, we first find the molar mass of the compound.

    The molar mass of the drug is the total of all the molar mass of the elements in the drug

    molar mass of Pt (platinum) in the drug = 195.078 g/mol

    molar mass of chlorine (Cl) in the drug = 2 x (35.453 g/mol) = 70.908 g/mol

    molar mass of ammonia (NH3) in the drug = 2 x (17.031 g/mol) = 34.062 g/mol

    Total molar mass of the drug = 195.078 g/mol + 70.908 g/mol + 34.062 g/mol = 300.048 g/mol

    fractional composition of chlorine in the drug = 70.908/300.048 = 0.236

    mass of chlorine required for 500 kg of the drug = 0.236 x 500 = 118 kg
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