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Describe the difference between the following and list any particular advantage possessed by one over the other a)filters and monochromators as wavelength selectors
Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 6.00×10?3M ? The pKa of acetic acid is 4.76.
Which solution would increase the osmotic pressure of water the most?
Show how to make N-methylpropionamide using propionic acid and methylamine and other necessary reagents. The methylamine and propionic acid do not both have to be used in the first step.
Calculate the percentage yield if 0.2 moles of H2O was formed when 0.6 mol of methane
In dilute solution the carbonyl absorption band of II occurs at 1702/cm. Explain this observation. stretching vibration in carboxylic acids is heavily mixed
a student immersed a 8.27g of unknown metal sample in a graduated cylinder containing 1ml of water. she noted the water
How does the addition of 10 ml of 1M KCl change the solubility of Ca(OH)2 in an aqueous solution
A quality control chemist at Dow Chemical tried to determine purity of NaOH using titration.He measured out 0.500 g NaOH sample, and dissolved it in 20 mL water. 31.2 mL of a 0.386 mol/L HCl solution was used to reach the end point.
(a) What is the pH of this buffer (b) What is the pH of the buffer after the addition of 0.48 mol of NaOH. (assume no volume change) (c) What is the pH of the original buffer after the addition of 0.23 mol of HI. (assume no volume change)
what mass of this substance must evaporate in order to freeze 190 of water initially at 24? the heat of fusion of water
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution
Phenolphthalein is an acid base indicator. What color does it possess in the presence of excess hydrogen (i.e., hydronium) ions?
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