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Your lab group is given 20ml of a 20% of a 20%(w/v) glucose solution and an unlimited amount of water. From the starting 20% glucose solution, your group wants to make 100ml of 0.2% glucose solution. Design a two step dilution series so that at the end your group has the desired glucose solution.
Dilution 1: _____ml of 20% glucose + _____ ml of water= _____ ml of _____ % glucose
Dilution 2: _____ ml of Dilution 1 + ______ ml of water= 100 ml of 0.2% glucose
If a typical antacid tablet contains 2.0 g of sodium hydrogen carbonate, how many moles of carbon dioxide should one tablet yield? 0.024 moles per tablet
calculate deltas if 1 mol of liquid water is heated from 0.00degrees c to 10 degrees c under constant pressure if cpm
Calculate the pH after the following volumes of titrant have been added: 0 mL, 20 mL, 59 mL, 60 mL 61 mL 65 mL.
Problem- Lets combine your knowledge of transpiration and photosynthesis on this question. In a natural environment, which of the following could negatively impact the rate of photosynthesis?
Question- A galvanic cell consists of an Au/Au3+ electrode (Eo=+1.50v) and a cu/cu2+ electrode (eo=+0.34v). Calculate the cell potential (Ecell) at 25 Celsius if [Au3+]=2.8x10-7 M and [Cu2+]=7.3x10-5
Calculate the pH of a buffer formed by mixing 60. mL of 0.13 M lactic acid with 86 mL of 0.26 M sodium lactate.
Ksp for PbCrO4 at 25oC is 2.0 x 10-14. A sample of 1.000 mg of PbCrO4 is added to 1.0 L of water at this temperature.
A 40.0ml sample of 0.150 Ba(OH)2 is titrated with 0.400M NH)3 . Calculate the pH after the addition of the following volumes of acid, and plot the versus milliliters of added.
Question- A solution is made by mixing 500.0 mL of 4.0 M NH3 and 500.0 mL of 0.40 M AgNO3. Ag+ reacts with NH3 to form AgNH3+ and Ag(NH3)2+ according to the equilibrium reactions
An optically active compound A, C6H10O2, when dissolved in NaOH solution, consumed one equivalent of base. On acidification, compound A was slowly regenerated. Treatment of A with LiAlH4 in ether followed by protonolysis gave an optically inactive..
Express the concentration of a 0.0510 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
What is the internal energy (U) change of a system that emits 358 J of heat and receives 412 J of work
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