Chemistry, 25.07.2019 14:30 kennethcraft901

Calculate the ph of the resulting solution if 34.0 ml of 0.340 m hcl(aq is added to

Answers: 1

Show answers

Answers

According to the reaction equation:

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

a) Part 1):

first, we need to get moles HCl = molarity * volume

= 0.34m * 0.034

= 0.01156 mol

then, we need moles of NaOH = molarity * volume

= 0.34 * 0.039

= 0.01326 mol

when NaOH excess:

∴ NaOH remaining = 0.01326 - 0.01156

= 0.0017 mol

when the total volume = 0.039 + 0.034

= 0.073 L

∴[OH] = moles / total volume

= 0.0017mol / 0.073 L

= 0.0233 M

∴ POH = -㏒[OH-]

= -㏒0.0233

= 1.63

∴ PH = 14- 1.63

= 12.37

b) part 2:

as we got moles HCl = molarity * volume

= 0.34 * 0.034

= 0.01156 mol

then moles NaOH = molarity * volume

= 0.39 * 0.044

= 0.01716 mol

NaOH remaining = 0.01716 - 0.01156

= 0.0056 mol

when the total volume = 0.034 + 0.044

= 0.078 L
∴[OH-] = 0.0056 / 0.078

= 0.0718 M

∴ POH = -㏒[OH-]

= -㏒0.0718

= 1.14

∴PH = 14 - POH

= 14 -POH

= 14 - 1.14

= 12.86

Calculate the ph of the resulting solution if 34.0 ml of 0.340 m hcl(aq is added to

Calculate the ph of the resulting solution if 34.0 ml of 0.340 m hcl(aq is added to

Answer from: hela9astrid

a. pH = 12.711

b. pH = 1.769

Further explanation

pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.

pH = - log [H⁺]

So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.

A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.

The pH value of a reaction between strong acid HCl and strong base NaOH can be estimated from the rest of the reaction product

1. If the remainder of the reaction product is obtained the remaining strong base of NaOH then the pH is sought from the concentration of OH⁻ / [OH⁻] by using the formula pH = 14-pOH

[OH ⁻] = b. Mb where

b = number of OH⁻

Mb = strong base concentration

2. If the rest of the reaction results obtained the remaining strong acid HCl, the pH is sought from the concentration of H⁺ / [H⁺] by using the formula

[H⁺] = a. M

a = valence of acid / amount of H⁺ released

M = acid concentration.

3. if both of them run out of reaction, then pH = 7

We complete the answer choices

Calculate the pH of the resulting solution if 34.0 mL of 0.340 M HCL (aq) is added to

a) 44.0mL of 0.340 M NaOH (aq).

b) 24.0mL of 0.440 M NaOH (aq)

a. mole HCl = 34.0mL x 0.340 M = 11.56 mmol

mol NaOH = 44.0 ml x 0.340 M = 14.96 mmol

The remaining moles: 14.96 - 11.56 = 3.4 mmol

[OH-] = mmol / total volume

[OH-] = 3.4 / 44 + 34

[OH-] = 0.0513

pOH = - log 5.13.10-2

pOH = 1,289

pH = 14-1.289 = 12.711

b. mole HCl = 34.0mL x 0.340 M = 11.56 mmol

mol NaOH = 24.0mL x 0.440 M = 10.56 mmol

The remaining moles: 11.56 -11.56 = 1 mmol

[H+] = mmol / total volume

[H+] = 1 / 24 + 34

[H+] =0.017

pH = - log 0.017

pH = 1.769

Learn more

the pH of a solution

link

Calculate the pH

link

the pH of a 2.0 M solution of HClO4

link

Keywords : pH, acid, base, HCl,NaOH

Answer from: Quest

I'm not sure but i will try to find out

Answer from: Quest

the ratio of the conjugate base to the acid required to attain the desired ph.

Another question on Chemistry

Chemistry, 22.06.2019 20:00

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.

Answers: 3

Answer

Chemistry, 22.06.2019 23:30

If it is an isoelectronic series select true, if not select false. o2-, s2-, se2-, te2- na+, k+, rb+, cs+ n3-, p3-, as3-, sb3- ag, cd+, sn3+, sb4+ f-, cl-, br-, i- f-, ne, na+, mg2+ s2-, s, s6+

Answers: 1

Answer

Chemistry, 23.06.2019 01:30

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?

Answers: 1

Answer

Chemistry, 23.06.2019 03:50

What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.

Answers: 2

Answer

You know the right answer?

Calculate the ph of the resulting solution if 34.0 ml of 0.340 m hcl(aq is added to...

Questions