= 75.7 L
= 0.27252 mol Ca2+
= 0.09084 mol Mg2+
Total mol = 0.27252 mol + 0.09084 mol = 0.36336 mol
Sodium carbonate is often added to laundry detergents to soften hard water and make the detergent more effective. Suppose that a particular detergent mixture is designed to soften hard water that is 3.6×10−3 M in Ca2 + and 1.2×10−3 M in Mg2 + and that the average capacity of a washing machine is 20.0 gallons of water.
If the detergent requires using 0.66 kg detergent per load of laundry, determine what percentage (by mass) of the detergent should be sodium carbonate in order to completely precipitate all of the calcium and magnesium ions in an average load of laundry water.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Solution Stoichiometry concept. You can view video lessons to learn Solution Stoichiometry. Or if you need more Solution Stoichiometry practice, you can also practice Solution Stoichiometry practice problems.