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What would be the pH of a solution prepared by dissolving 19.2 g NaOH (MM = 40.0 g/mol) in enough water to make 1.05 L of solution?
mol of NaOH = mass/MW = 19.2/40 = 0.48 molV = 1.05LM = mol/V = 0.48/1.05M =0.45714 MpOH = -log(0.45714) = 0.33995pH = 14-0.33995pH = 13.66005
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An isotonic saline solution was prepared by dissolving 0.92 g of NaCI in enough distilled water to make 100 ml solution. What is the percent by mass/volume of the solution?
100-0.92= 99.0899.08/100×100= 99.08%
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An isotonic saline solution was prepared by dissolving 0.92g of NaClin 2 points enough distilled water to make 100ml solution. What is the percent by mass/volume of the solution?
Molecular weight of isotonic saline = 58.50.92×58.5 = 53.8253.92/100×100= 53.92%
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A solution is prepared by dissolving 19.2 g of glucose in 205 g of water. The final
volume of the solution is 214 ml. Find the concentration of the solution in units of
molality.
250 ml × 0.4 = 100ml= 100/2 = 50mlMolar mass of sodium hydrogen carbonate = 84.007Molarity = 111/84.007 = 1.32 mol1.32/20= 0.066mol/L
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What is the concentration (M) of a NaCl solution prepared by dissolving 5.3 g of NaCl in sufficient water to give 115 mL of solution?
Concentration of NaCl = amountof NaCl / L n of NaCl = 5.3 g/ 58.5 = 0.906 mol (but it is in 115 mL) In one L concentration is 1000/115...
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A Ni^2+ solution was prepared by dissolving 300.1g of NiCl2.6H2O in 1dm^3 of distilled water. The Ni^2+ concentration of the solution was found to be 1moldm^-3. Calculate the purity of the solution.
The solution is 74.7% pure.
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Calculate the molarity of a solution prepared by dissolving 78.6g of KF in enough water to produce 225ml of solution. (at mass of F= 19g/mol, K= 39.10g/mol
molarity = amount / liter amount n = m/Mw m-mass Mw - molecular mass in the question m = 78.6 g Mw = 58.1 g/mol n = 78.6/58.1 = 1.35...
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Calculate the [H3O+], [OH], pH, and pOH for a solution prepared by dissolving 3.1g KOH(s) (FW=56g/mol) unto enough water to give a volume of 0.500L.
Answer on Question #99054 – Chemistry – OtherTask:Calculate the [H3O+], [OH-], pH, and pOH for a solution prepared by dissolving 3.1g KOH(s) (FW=56 g/mol) unto enough water to give a...
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what is the molarity of a CuCl2 in a solution prepared by dissolving 92 g of CuCl2 in enough water to yield a 1.60 L of solution
Molecular Weight of CuCl2 = 134 gm/moleIf 134 gm of CuCl2 is dissolve in 1000ml i.e 1L soution then the molarity of the solution is 1MTherefore using unitary method the...
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A solution of sulfuric acid was made by dissolving 20 grams of 98 percent sulfuric acid in 250 ml of water. Express the concentration of this solution in percent by weight
98% sulphuric acid means in 100 g sulphuric acid source exact amount of sulphuric acid, H2SO4 present 98 g. So in 20 g, exact amount of H2SO4 present =...
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