Why do water heaters lose their efficiency quicker in households with hard water?
A)The hard water calcium and magnesium ions corrode the heating element.
B)The hard water calcium carbonate deposits oxidize the inner tank wall.
C)The calcium carbonate on the inner surface of the hot water tank builds up to the point that it insulates the water from the heating element.
D)The hard water calcium ions exchange with iron ions from the inner metal wall which react with the water heater base to form rust and deteriorate the bottom of the tank.

Question

Quizplus · Accepted Answer

Hard water contains high levels of calcium and magnesium ions that can leave mineral deposits on the inner surfaces of the water heater tank. These deposits insulate the water from the heating element, making it less efficient at heating the water. Over time, the buildup of mineral deposits can also cause damage to the heater. Therefore, the correct answer is C.

Why Do Water Heaters Lose Their Efficiency Quicker in Households