How many grams of NaNO2 should be mixed with 20 mL of 0.5 M HNO2 to...

Question

Question

How many grams of NaNO₂ should be mixed with 20 mL of 0.5 M HNO₂ to buffer it at a pH of 3.50? The K_a for HNO₂ is 7.1 x 10^-4.

science chemistry

Answer 1

Answer #1

Answer 2

Similar Homework Help Questions

(Set 2) Practice Problems in Equilibrium All weak acids use this generic equation: HA(aq)+ H2O() A (aq) + H30*(aq) And...

(Set 2) Practice Problems in Equilibrium All weak acids use this generic equation: HA(aq)+ H2O() A (aq) + H30*(aq) And all weak bases use this one: B(aq)+ H2O(I) = BH*(aq)+ OH'(aq) Part A: Finding K, or Kb 3.012? What is the value of Ka for a weak acid if a 1.44 M solution has a pH 1. 2. A weak acid is 0.00987 M, but is found to be 25.5 % ionized. What is the pH? 3. The pH for...
What mass in grams of NaNO2 (69.0 g / mol) will it be necessary to add...

What mass in grams of NaNO2 (69.0 g / mol) will it be necessary to add to 250.0 ml of 0.200 M solution in HNO2 to produce a buffer of pH equal to 3.50 ka = 7.1x10 ^ -4)
calculate the quantity (in grams) of the salt NaNO2 that should be added to 300 ml...

calculate the quantity (in grams) of the salt NaNO2 that should be added to 300 ml of a 0.50 M solution of a weak acid, HNO2 to make a buffer with a ph of 4.00

What is the pH of a solution prepared to 0.040 M NaNO2. Ka HNO2 = 7.1...

What is the pH of a solution prepared to 0.040 M NaNO2. Ka HNO2 = 7.1 x 10-4
A buffer solution is 0.327 M in HNO2 and 0.292 M in NaNO2 . If Ka...

A buffer solution is 0.327 M in HNO2 and 0.292 M in NaNO2 . If Ka for HNO2 is 4.5×10-4 , what is the pH of this buffer solution?
What mass in grams of NaNO2 (69.0 g / mol) will it be necessary to add...

What mass in grams of NaNO2 (69.0 g / mol) will it be necessary to add to 250.0 ml of 0.200 M solution in HNO2 to produce a buffer of pH equal to 3.50

1.) a buffer solution is 0.453 M im HNO2 and 0.339 M in NaNO2. If Ka...

1.) a buffer solution is 0.453 M im HNO2 and 0.339 M in NaNO2. If Ka for HNO2 is 4.5x10^-4, what is the pH of this buffer solution? pH = ???? 2.) A buffer solution is 0.373 M in H2C2O4 and 0.303 M in KHC2O4. If Ka1 for H2C2O4 is 5.9x10^-2, what is the pH of this buffer solution? pH = ???? 3.) a buffer solution is 0.333 M in KH2PO4 and 0.248 M in K2HPO4. If Ka for H2PO4^-...
Calculate the pH of the buffer that results from mixing 90.0 mL of 0.350 M HNO2...

Calculate the pH of the buffer that results from mixing 90.0 mL of 0.350 M HNO2 and 75.0 mL of 0.500 M NaNO2. (Ka = 4.60 x 10-4) a. Using the above initial buffer, calculate the new pH of the buffer when 15.0 mL of a 1.0 M solution of HCl is added. b. Using the above initial buffer, calculate the new pH of the buffer when 0.500 g of NaOH is added.
7.1. How many grams of solid potassium hypochlorite should be added to 2.00 L of a...

7.1. How many grams of solid potassium hypochlorite should be added to 2.00 L of a 0.244 M hypochlorous acid solution to prepare a buffer with a pH of 6.733 ? ka = 3.5×10-8 grams potassium hypochlorite = g. 7.2. How many grams of solid ammonium chloride should be added to 2.00 L of a 0.273 M ammonia solution to prepare a buffer with a pH of 10.150 ? grams ammonium chloride = g. ka = 1.8×10-5 7.3. How many grams...

a. How much solid NaNO2 should you add to a solution of 850. mL of 0.200...

a. How much solid NaNO2 should you add to a solution of 850. mL of 0.200 M HNO2 to make a buffer with pH = 2.99? (The K. of HNO2 is 7.2 x 10) b. If you wanted to change the buffer solution you made in part (a) to solution with a buffer of pH = 4.10, what would you add, a strong acid or base? c. Pouradd-5.00 mt of 8.00 MHE to the solution: What is the new pH?...