Whát masŠ of precipitate (In g) Is formed when 20.5 mL of 0.300 Ni(NO3)2 reacts with 33.5 mL of 0.300 M NaOH in the following chemical reaction? Ni(NO3)2(aq) + 2 N2OH(aq) → Ni(OH).(s) + 2 NaNO.(aq)
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Q: diluted
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Q: question 2 please
A: Given data:
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- If the copper standard solution has a concentration of 25 μg/mL, what is the concentration of a prepared solution with 4 mL of the standard solution with 2 mL 10% hydroxylamine hydrochloride, 5 mL 10% ammonium acetate, and 5 mL of 0.1% bathocuproine prepared in a 25 mL volumetric flask?A diluted bleach solution was found to have a concentration of 0.0250 M. It was originally prepared by diluting 3.0 mL of full-strength commercial bleach, with water, to a total volume of 100.00 mL. What is the molar concentration of NaOCl in the full-strength commercial bleach solution?Potassium hydrogen phthalate is used as a primary standard in finding the concentration of a solution of sodium hydroxide by the reaction KHC8H4O4 + NaOH → NaKC8H4O4 + H2O. What is the molarity of the base if 32.75 mL is required to titrate 1.732 g of the primary standard?
- 25.00 mL of a solution containing KIO4 is treated with excess potassium iodide. IO4- + 8H+ + 7I- → 4I2 + 4H2O The resulting solution is titrated with 0.15 M sodium thiosulfate pentahydrate. The average titre was 21.76 mL. I2 + 2S2O32- → 2I- + S4O62- What mass of KIO4 (in g) was dissolved in water to make the original solution?What is the nitrate concentration of a solution prepared by mixing 215 mL of 0.150 M KNO3 with 155 mL of 0.125 M Mn(NO3)2? Report your answer to three decimal places.A titration of a 0.7879g sample potassium hydrogen phthalate, KHP (GFW= 204.23g/mole), required 21.25 mL of sodium hydroxide solution to reach the end point. What is the molarity of the solution?
- Ammonia reacts with hypobromite, OBr- as follows: 2NH3 + 3OBr- → N2 + 3Br- + 3H2O 1. Find the molarity of OBr- if 1.00 ml of OBr- solution reacts with 1.69mg of NH3 (MM = 17.03). (Express your final answer to 4 significant figures).A quantitative analysis for ethanol, C2H6O, can be accomplished by a redox back titration.Ethanol is oxidized to acetic acid, C2H4O2, using excess dichromate, Cr2O72–, which is reduced toCr3+. The excess dichromate is titrated with Fe2+, giving Cr3+ and Fe3+ as products. In a typicalanalysis, a 5.00-mL sample of a brandy is diluted to 500 mL in a volumetric flask. A 10.00-mLsample is taken and the ethanol is removed by distillation and collected in 50.00 mL of anacidified solution of 0.0200 M K2Cr2O7. A back titration of the unreacted Cr2O72–requires 21.48mL of 0.1014 M Fe2+. Calculate the %w/v ethanol in the brandyAnswer the following questions for the reaction NiCl2(aq)+2NaOH(aq)→Ni(OH)2(s)+2NaCl(aq) How many milliliters of 0.200 M NaOH solution are needed to react with 19.0 mL of a 0.400 M NiCl2 solution? Express your answer with the appropriate units How many grams of Ni(OH)2 are produced from the reaction of 41.0 mL of a 2.00 M NaOH solution and excess NiCl2? What is the molarity of 30.0 mL of a NiCl2 solution that reacts completely with 16.9 mL of a 0.340 M NaOH solution?