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1. Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 0.195 M in C2H5NH2 and 0.155 M in C2H5NH3Br.Express your answer using two decimal places.
pH = ? (I entered 10.79 and there was a message that Not quite. Check through your calculations; you may have made a rounding error or used the wrong number of significant figures.)
2. Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 12.5 g of HC2H3O2 and 13.5 g of NaC2H3O2 in 150.0 ml of solution.Express your answer using two decimal places.
pH = ?
A 100.0 -ml buffer solution is 0.110 M in NH3 and 0.135 M in NH4Br.
3. What mass of HCl could this buffer neutralize before pH the fell below 9.00?Express your answer using two significant figures.
m = ?
4. If the same volume of the buffer were 0.260 M in NH3 and 0.390 M in NH4Br, what mass of HCl could be handled before the pH fell below 9.00?Express your answer using two significant figures.
What exactly is the reduction of alkynes? I just understand that it is a method for synthesizing alkenes. Why are the leaving groups for E2 reactions not as good as E1 reactions?
A voltaic cell employs the following redox reaction: Sn^2+(aq)+ Mn(s)--> Sn(s) + Mn^2+(aq) Calculate the cell potential at 25 under each of the following conditions.
what is the theoretical mass of xenon tetraflouride that form when 118. grams of xenon is reacted with 62.0 grams of flourine?
How many grams of malonic acid would be needed to make 50.0 milliliters (0.0500 L) of 0.200 M malonic acid?
Determine the molality and molarity of a solution made by dissolving 445 g of NaBr in 2600 ml of water ?
when ethane (C2H6) is burned, how many grams of oxygen are needed to react with 477 grams of ethane?
List five food product would give a positive iodine-starch test for carbohydrate mention somthing beside potato
Chemists often use molarity ,M in Moles/liter , to measure the concentration of solutions. Molarity is a common unit of concentration because the volume of a liquid is very easy to measure
reacts with excess Mg to produce 4.20L of H2 gas at 745 mmHg pressure and 35 degrees celcius. What is the molarity of the HCl solution?
t 50°C the value of KW is 5.5 x 10-14. What are the molarities of hydronium ion and hydroxide ions in a neutral solution at this temperature.
If 32.0 g CaC2 are consumed in this reaction, how many moles of H2O are needed?
A volume of 200mL of nitrogen is collected over water at a temperture of 24 degrees celcius and the atmospheric pressure of 100 kPa. What will be the volume of dry nitrogen at 24 degrees celcius and 125 kPa?
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