Water hardness is often expressed or defined as the content of the ions of Calcium and magnesium that make it "hard". To know the total hardness of water, EDTA titration is often used expressed as the mol of EDTA per liter of Solution.
mol of solute = (12.45 mL)(0.01111 mol/L)*(1L/1000mL)=1.3832 x 10-4.
Therefore, water hardness = 1.3832x10-4 mol/0.025 L = 5.53278x10^-3 M
Answer: 90
Explanation: Sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. When water is heated, the molecules gain energy and, thus, move faster. As they move faster, they come into contact with the sugar more often, causing it to dissolve faster.
The answer you’re looking for is
C.
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Answer:
a) the ability to extend the theory to make predictions
b) it is explanatory
Explanation:
Could be a Hallmark of a Scientific Theory: a & b
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