Problem: A fertilizer railroad car carrying 34400 gallons of commercial aqueous ammonia (30% ammonia by mass) tips over and spills. The density of the aqueous ammonia solution is 0.88 g/cm3.What mass of citric acid, C(OH)(COOH)(CH2COOH)2, (which contains three acidic protons) is required to neutralize the spill? 1 gallon = 3.785 L.

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Step 1. Mass of ammonia solution

ρ=mVm=(ρ)(V)m=(0.88gcm3×1 cm31 mL×1 mL10-3 L×3.785 L1 gallon)(34400 gallon)

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Problem Details

A fertilizer railroad car carrying 34400 gallons of commercial aqueous ammonia (30% ammonia by mass) tips over and spills. The density of the aqueous ammonia solution is 0.88 g/cm3.

What mass of citric acid, C(OH)(COOH)(CH2COOH)2, (which contains three acidic protons) is required to neutralize the spill? 1 gallon = 3.785 L.

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