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Quinine in a 1.664 g antimalarial tablet was dissolved insufficient 0.10 M HCl to give 500 mL of solution . A 20.00 mLaliquot was then diluted to 100.o mL with the acid. The fluorescence intensity for the diluted sample at 347.5 nm provideda reading of 245 on an arbitary sacle . A standard 100 ppm quininesolution registered 125 when measured under conditions identical to those for the diluted sample. Calculate the mass inmilligrams of quinine in the tablet.
Describe a simple and practical way to make 1.00 L of this buffer solution, assuming a 1.0 M solution of the molecular base is available and that the chloride salt of the conjugate acid is available as a solid
Indicate the solubility of the following solutes in 100 g of water
Write a balanced radiochemical equation describing this process and the nuclide that forms. include all superscripts and subscripts representing mass and charge.
Use values of Ksp for Zn(OH)2 and Kf for Zn(OH)4-2 (page 330) to predict if a precipitate will form when you prepare a solution which contains 0.010 M Zn2+ and 1.0 M NaOH.
what is the chemical calculation to figure out the following: what mass of the indicated solute does the following solution contain: 17.8 ml of 0.119 M CaCl2
Trimethylamine, (CH3)3N, has a Kb= 7.4x 10^-5. What is the percent dissociation of a 0.15 M solution of this base in water
calculate how many moles of nh3 form when each quantity of reactant completely reacts.3n2h4 l 4nh3 g n2 g2.6 mole
24.4 grams of metal was heated in boiling water and then dropped in a calorimeter containing 100 grams of water. The temperature before the metal was dropped in was 23 C and the final temperature was 25.1 C. specific heat
graph this phase change,with energy as a function of temperature.Do not assume that the eteam is an ideal gas. ?H fus=334.0 j/g ?H vapeur =2260 j/g Ch2o solid=2.11 j/g.k Ch2o liquid=4.18 j/g.k Ch2o gas=2.08 j/g.k a=5.464l62 bar/mol b=0.03049L/mol
Determine the vapro pressure ( in mmHg ) of a substance at 29*C, whose boiling point is 76*C and has a changeHvap of 38.7 kj/mol.
From the solubility data given, calculate the solubility products for the following compound Ag3PO4, 6.7 x 10^-3 g/L
An ionic equation has 2H+(aq) on the left side and H2(g) on the right. Are these species spectators? Explain
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