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A 0.2570g of pure sulfamic acid, HSO3 . NH2, is neutralized by a KOH solution. A 25.70 mL of KOH was added to the solution and 3.40 mL of HCl was used to back titrate the solution. In the ratio determination of 23.10 mL, HCl was used to completely neutralize 20.00 mL of KOH. Find the normality of the acid and base.
why is a stemless funnel recommended for filtration of the hot saturated solution? 2. in your buchner funnel, can you use filter paper that is to big for the funnel and curls up around the edges? why?
What concentration of glucose will be isotonic with 1.2% CaCl2 solution? Assume a van't Hoff factor of 2.8 for the CaCl2 solution. The molar masses of glucose and CaCl2 are 180.2 g/mol and 111.0 g/mol, respectively.
Consider the following compounds and suppose that 0.5M solutions are prepared of each:Nal, NH4Br, KF, KCN, KC2H3O2, CsNO3, and KBr. Write the formulas of those that have solutions that are A) acidic B)basic and C) Neutral
What is the temperature of 0.46 mol of gas at a pressure of 1.3 atm and a volume of 11.7 L ? Express your answer using two significant figures.
what is the net ionic equation potassium hydroxide and iron(III) nitrate.
For the reaction 2CH4(g) +3Cl2(g) -> 2CHCl3(l) + 3H2(g), the standard enthaly of change of reaction = -118.6KJ. The standard enthalpy of change of reaction
A 100.0 mg sample of a common organic compound containing C, H and S was burned in oxygen, forming 283.5 mg of CO2 and 48.4 mg of H2O. What is the simplest (empirical) formula of this compound
what is the pH of the solution after the addition of 3.0 ml of HCl? e) What is the pH of the solution at the equivalence point? f) what is the pH of the solution when 5.0ml more of the HCl solution is added after the equivalence point has ben reac..
A can of Mountain Dew soda contains 46 g of sugar. Assuming that your body completely digests this sugar, 170 kcal of heat energy is available from the sugar. Approximately how many grams of water will you have to evaporate as sweat to lose this 1..
How far will the protein travel in one hour in an electrophoresis gel at 25C when a field of 1.0 V cm^-1 is applied if the viscosity of the gel is 0.891 cP
The delta H sub f of FeBr3 is -269 kJ/mol and the delta H for the reaction 2Fe (s) + 3Br2 (g)----> 2Br3 (s) is -631 kJ/mol . Calculate the Delta H of evaporation of Br2 (l) which is a liquid at 25 degrees Celcius.
A 43.0 g sample of Fe metal at 90.0°C is placed into 150.0 mL of water at 22.5 °C. After equilibrium is reached the final temperature of the system is 24.5°C. What is the specific heat capacity of the metal
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