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Calculate the pH of 0.180 g of potassium biphthalate (pKa = 5.4) in 50.0 mL of water
Please show the steps required to solve
Identify the chemical components and the proportions necessary to achieve a buffer with the desired pH. Include relevant calculations in your answer.
A 2.35 g sample of KClO3 is reacted. How many mL of O2 gas is produced at a pressure of 740. mmHg and a temperature of 25 °C? 2KClO3 (s) → 2KCl (s) + 3O2(g)
What is the relationship between Ka and pKa - what are the potential sources for errors in this experiment?
The sample is diluted with 70.825 g of water. A 13.898 g aliquot of this solution is then titrated with 0.1090 M HCl. It required 29.89 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous waste.
You'd like to prepare a 250.0 mL of a 0.4570 M NaCl solution using a volumetric flask. What mass of NaCl will you need in grams
Use the lock-and-key analogy to explain why excessively acidic body fluids (acidosis) could destroy enzyme function.
The percentage of an additive of gasoline was measured six times with the following results: 0.13, 0.12, 0.16, 0.17, 0.20, 0.11%. Find the 90% confidence level interval
Methyl Orange is an acid-base indicator. In dilute solution, at pH greater than 4.4, it is yellow. At pH=3.2 the solution appears red. Draw a structure of the species that is formed at the lower pH of the acid proton adds to the azo nitrogen atom ..
Hydrogen sulfide decomposes according to the following equation, for which Kc = 0.00011 at a given temperature. 2 H2S(g) 2 H2(g) + S2(g)
silver nitrate solution is mixed with sodium sulfide solution producing a black solid and sodium nitrate solution
If 45.0mL of ethanol {(density = 0.789 g/mL) initially at 9.0 degrees C is mixed with 45.0mL of water (density} = 1.0g/mL) initially at 28.3 degrees C in an insulated beaker, and assuming that no heat is lost, what is the final temperature of the m..
dehydrohalogenation of 2-bromo-2,3-dimethylbutane with a strong base can lead to multiple products with the zaitsez product being the favored product. what is this product.
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