A solution is labeled "0.749 M HCN." What are the following in the solution? Express your...

A solution is labeled "0.749 M HCN." What are the following in the solution? Express your answers to three significant figures even when only two are valid. Acid-base table

[HCN] =

[H30 ^1+] =

[CN ^1-] =

pH =

Expert Solution

	HCN
Initial concentration (M)	0.749	0	0
Change (M)	-x	x	x
Equilibrium concentration (M)	0.749-x	x	x

Since Ka is small, x is small can 0.749-x can be approximated to 0.749

queen_honey_blossom answered 2 years ago

A solution is labeled "0.084 M HCN." What are the following in the solution? Express your...

A solution is labeled "0.084 M HCN." What are the following in the solution? Express your answers to three significant figures even when only two are valid. Acid-base table [HCN] = ______ M [H3O1+] =_______ M [CN1-] =_______ M pH = ________

a. What is the pH of a 0.040 M solution of HCN? Find the concentrations of...

a. What is the pH of a 0.040 M solution of HCN? Find the concentrations of all the major species in the solution? [HCN], [H3O+], [CN-]

What is [H3O+] and pH in a 0.10 M solution of HCN at 25

The pH of a 0.10 M HCN solution is 5.20. a. What is [H3O+ ] in...

The pH of a 0.10 M HCN solution is 5.20. a. What is [H3O+ ] in that solution? _______________ M b. What is [CN-]? What is [HCN]? (Where do the H+ and CN - ions come from?) [CN-] = _______________ M; [HCN] = _____________ M c. What is the value of Ka for HCN? What is the value of pKa? Ka = _______________ pKa = _______________

A buffer solution consists of .195 M HCN and .22 M NaCN. a) what is the...

A buffer solution consists of .195 M HCN and .22 M NaCN. a) what is the pH of this buffer solution? b) you add 50 mL of .15 M HCl to 300.0 mL of this buffer solution. What will the pH be? c) You add 20.0 mL of .26 M NaOH to 150.0 mL of this buffer solution. What will the pH be?

Part A What is the pH of a 0.215 M ammonia solution? Express your answer numerically...

Part A What is the pH of a 0.215 M ammonia solution? Express your answer numerically to two decimal places. Hints pH = 4.64 SubmitMy AnswersGive Up Incorrect; Try Again; 5 attempts remaining Part B What is the percent ionization of ammonia at this concentration? Express your answer with the appropriate units. Hints % ionization = SubmitMy AnswersGive Up

What is the pH of a 0.445 M ammonia solution? Express your answer numerically to two...

What is the pH of a 0.445 M ammonia solution? Express your answer numerically to two decimal places.

The pH of 0.30 M solution of HCN is 5.20. Calculate the Ka value for HCN.

Part A) Determine the [OH−] of a solution that is 0.150 M in CO32−. Express your...

Part A) Determine the [OH−] of a solution that is 0.150 M in CO32−. Express your answer using two significant figures. Part B) Determine the pH of a solution that is 0.150 M in CO32−. Express your answer to two decimal places. Part C) Determine the pOH of a solution that is 0.150 M in CO32−. Express your answer to two decimal places.

Part A Determine the [OH−] of a solution that is 0.140 M in CO3. Express your...

Part A Determine the [OH−] of a solution that is 0.140 M in CO3. Express your answer using two significant figures. Part B Determine pH of this solution. Express your answer to two decimal places.

Question