1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fgiga [73]
1 year ago
7

What is the pH of a solution that is 0.40 M NaBrO and 0.50 M HBrO (hypobromous acid) (Ka for HBrO = 2.3 x 10^-9)

Chemistry
1 answer:
Pie1 year ago
8 0

Answer

pH=8.5414

Procedure

The Henderson–Hasselbalch equation relates the pH of a chemical solution of a weak acid to the numerical value of the acid dissociation constant, Kₐ. In this equation, [HA] and [A⁻] refer to the equilibrium concentrations of the conjugate acid-base pair used to create the buffer solution.

pH = pKa + log₁₀ ([A⁻] / [HA])

Where

pH = acidity of a buffer solution

pKa = negative logarithm of Ka

Ka =acid disassociation constant

[HA]= concentration of an acid

[A⁻]= concentration of conjugate base

First, calculate the pKa

pKa=-log₁₀(Ka)= 8.6383

Then use the equation to get the pH (in this case the acid is HBrO)

pH=8.6383+\log_{10}(\frac{0.40\text{ M}}{0.50\text{ M}})=8.5414

You might be interested in
What would A be? HELP ASAP
Minchanka [31]
Si has 4 available elections. Each Cl has 7.
7 x 4 = 28 + the 4 from your Si gives the total of 32 total electrons.
6 0
3 years ago
Given the following UNBALANCED reaction: NH3 (g) <--> N2 (g) + H2 (g) If 1
Yakvenalex [24]

Answer:

C. 1.35

Explanation:

                                                     2NH3 (g) <-->          N2 (g) +             3H2 (g)

Initial concentration                2.2 mol/0.95L       1.1 mol/0.95L           0

change in concentration        2x                             x                           3x

                                                 -0.84 M                  +0.42M                +1.26M

Equilibrium                       1.4 mol/0.95L=1.47M        1.58 M                   1.26 M

concentration

Change in concentration(NH3) = (2.2-1.4)mol/0.95 L = 0.84M

Equilibrium concentration (N2) = 1.1/0.95 +0.42=1.58 M

Equilibrium concentration(NH3) = 1.4/0.95 = 1.47M

K = [N2]*{H2]/[NH3] = 1.58M*1.26M/1.47M = 1.35 M

8 0
2 years ago
Air at 25°C with a dew point of 10 °C enters a humidifier. The air leaving the unit has an absolute humidity of 0.07 kg of water
madreJ [45]

Explanation:

The given data is as follows.

         Temperature of dry bulb of air = 25^{o}C

          Dew point = 10^{o}C = (10 + 273) K = 283 K

At the dew point temperature, the first drop of water condenses out of air and then,

        Partial pressure of water vapor (P_{a}) = vapor pressure of water at a given temperature (P^{s}_{a})

Using Antoine's equation we get the following.

            ln (P^{s}_{a}) = 16.26205 - \frac{3799.887}{T(K) - 46.854}

            ln (P^{s}_{a}) = 16.26205 - \frac{3799.887}{283 - 46.854}

                               = 0.17079

                   P^{s}_{a} = 1.18624 kPa

As total pressure (P_{t}) = atmospheric pressure = 760 mm Hg

                                   = 101..325 kPa

The absolute humidity of inlet air = \frac{P^{s}_{a}}{P_{t} - P^{s}_{a}} \times \frac{18 kg H_{2}O}{29 \text{kg dry air}}

                  \frac{1.18624}{101.325 - 1.18624} \times \frac{18 kg H_{2}O}{29 \text{kg dry air}}

                 = 0.00735 kg H_{2}O/ kg dry air

Hence, air leaving the humidifier has a has an absolute humidity (%) of 0.07 kg H_{2}O/ kg dry air.

Therefore, amount of water evaporated for every 1 kg dry air entering the humidifier is as follows.

                 0.07 kg - 0.00735 kg

              = 0.06265 kg H_{2}O for every 1 kg dry air

Hence, calculate the amount of water evaporated for every 100 kg of dry air as follows.

                0.06265 kg \times 100

                  = 6.265 kg

Thus, we can conclude that kg of water the must be evaporated into the air for every 100 kg of dry air entering the unit is 6.265 kg.

3 0
3 years ago
Assignment: The Meaning of Mitosis Exploration
hjlf
1. Mitosis is a process where a single cell divides into two identical daughter cells (cell division).

2. Mitosis is important because it plays an important part in the development of embryos, and it is important for the growth and developemet of our body as well.

3. The four phases of mitosis are: Prophase, metaphase, anaphase, and telophase.

4. Two gap phases (G1 and G2); an S (for synthesis) phase, in which the genetic material is duplicated.

5. During S phase all of the chromosomes are replicated.

I hope that helps! c:
5 0
3 years ago
Read 2 more answers
The area of a telescope lens is 7903 rnrn2 {a) What is the area in square feet (ft2)? (b) If it takes a technician 45 s to polis
LekaFEV [45]

Answer:

Area is 0.08504ft^{2} and 2.6\times 10^{3}s are needed for polishing

Explanation:

(a) ft is unit of F.P.S system whether mm is unit of M.K.S system.

According to unit conversion, 1mm=0.00328ft

So, 1mm^{2}=(0.00328)^{2}ft^{2}=1.076\times 10^{-5}ft^{2}

hence, 7903mm^{2}=7903\times 1.076\times 10^{-5}ft^{2}=0.08504ft^{2}

So, area of telescope lens is 0.08504ft^{2}

(b)135mm^{2} are polished in 45s

So, 7903mm^{2} are polished in \frac{45\times 7903}{135}s or 2.6\times 10^{3}s

5 0
2 years ago
Other questions:
  • Help science!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    15·1 answer
  • Angelo wants to develop a new series of pots and pans for use in cooking. Which property of metals should he be most concerned a
    5·1 answer
  • What is the oxidation state of cl in hclo4?
    12·2 answers
  • Which statement most accurately compares the temperature of the core of the sun to its surface
    8·1 answer
  • A cooling curve has two flat lines, or plateaus. What does the plateau at the higher temperature represent?
    14·2 answers
  • Please review the attachment
    12·2 answers
  • Identify these element:a non-metal in the same group as leads?
    13·1 answer
  • Four students drew part of the rock cycle on the board. Which drawing was correct?
    9·1 answer
  • Formulación del dióxido de cobalto
    9·1 answer
  • Find the molarity of 0.50 l solution containing 9.0 g nacl
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!