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Chemistry: Post your doubts here!
What is the pH in a saturated solution of Ca(OH)2? Ksp = 5.5 x 10^-6 mol^3 dm^-9 for Ca(OH)2 Answer : pH = 12.35 I keep getting pH = 12.05 with my method. Ksp = [Ca^2+][OH^-]^2 5.5 x 10^-6 = (x) (2x)^2 4x^3 = 5.5 x 10^-6 x = 0.0111 mol dm^-3 pOH = -log [0.0111] pOH = 1.95 pH = 14 - 1.95... -
Mathematics: Post your doubts here!
Thank you. :) I've done the rest of the question. -
Chemistry: Post your doubts here!
The Ksp of calcium sulfate, CaSO4, is 9.1 x 10^-6 mol^2 dm^-6. What is the molar concentration of CaSO4 in a saturated solution? -
Mathematics: Post your doubts here!
I need help with this. Stuck at part (i) now. -
Chemistry: Post your doubts here!
Yup. That is the solution. :) pH = 4.44 -
Chemistry: Post your doubts here!
I will be getting the answer and solution from tomorrow's lecture. I'll write back to you tomorrow! :) -
Chemistry: Post your doubts here!
Calculate the pH of the solution formed by mixing 60cm^3 of 0.2 mol dm^-3 of ethanoic acid with 40cm^3 of a 0.10 mol dm^-3 of sodium hydroxide. Ka for ethanoic acid = 1.80 x 10^-5 mol dm^-3 . Can anyone help me with this? (Calculating the pH during weak acid-strong base titration) -
A Level Economics:
I would like to know why : The point of allocative efficiency is deemed to exist when the price of a product is equal to its MC. -
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Chemistry: Post your doubts here!
Need help with this question . Thank you in advance. -
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Chemistry: Post your doubts here!
October/November 2011 (Variant 3), Question 33. How do I do this question? -
Physics: Post your doubts here!
2012 Paper 1 Variant 1 : http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s12_qp_11.pdf Answers : http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_s12_ms_11.pdf I need help in...