timmonskids6027
12.03.2020 •
Chemistry
A chemist dissolves 551 g of pure barium hydroxide in enough water to make up 180. ml of solution.
Calculate the pH of the solution. The temperature of the solution is 25 °C.
Be sure your answer has the correct number of significant digits.
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Ответ:
What is the mass of solute, in grams, in 250.00 mL of a 0.0125 M solution of KMnO4? Moles KMnO4 = M × V = 0.0125 M × 0.250 L = 3.13 × 10-3 mol KMnO4 grams KMnO4 = 3.13 × 10-3 mol KMnO4 × ( 158.03 g KMnO4/1 mol KMnO4) = 0.495 g 4.