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Irina-Kira [14]
3 years ago
5

Why does decreasing the temperature of orange juice increase its pH level? Is it something to do with the chemical equilibrium?

Chemistry
1 answer:
oksian1 [2.3K]3 years ago
5 0
Because you are getting rid of the acid in the juice so you are balancing the equilibrium because you have lesd acid and the base is the same making it more equal
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In a certain industrial process involving a heterogeneous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.
olga nikolaevna [1]

Answer:

a. The second run will be faster.

d. The second run has twice the surface area.

Explanation:

The rate of a reaction is proportional to the surface area of a catalyst. Given the volume (V) of a sphere, we can find its surface area (A) using the following expression.

A=\pi ^{1/3} (6V)^{2/3}

The area of the 10.0 cm³-sphere is:

A=\pi ^{1/3} (6.10.0)^{2/3}=22.4cm^{2}

The area of each 1.25 cm³-sphere is:

A=\pi ^{1/3} (6. 1.25)^{2/3}=5.61cm^{2}

The total area of the 8 1.25cm³-spheres is 8 × 5.61 cm² = 44.9 cm²

The ratio of  8 1.25cm³-sphere to 10.0 cm³-sphere is 44.9 cm²/22.4 cm² = 2.00

Since the surface area is doubled, the second run will be faster.

6 0
3 years ago
What is the molarity of aqueous lithium bromide if 25.0 mL of LiBr reacts with 10.0 mL of 0.250 M Pb(NO 3) 2
bixtya [17]

The molarity of aqueous lithium bromide, LiBr solution is 0.2 M

We'll begin by calculating the number of mole of Pb(NO₃)₂ in the solution.

  • Volume = 10 mL = 10 / 1000 = 0.01 L
  • Molarity of Pb(NO₃)₂ = 0.250 M
  • Mole of Pb(NO₃)₂ =?

Mole = Molarity x Volume

Mole of Pb(NO₃)₂ = 0.25 × 0.01

Mole of Pb(NO₃)₂ = 0.0025 mole

Next, we shall determine the mole of LiBr required to react with 0.0025 mole of Pb(NO₃)₂

Pb(NO₃)₂ + 2LiBr —> PbBr₂ + 2LiNO₃

From the balanced equation above,

1 mole of Pb(NO₃)₂ reacted with 2 mole of LiBr.

Therefore,

0.0025 mole of Pb(NO₃)₂ will react with = 2 × 0.0025 = 0.005 mole of LiBr

Finally, we shall determine the molarity of the LiBr solution

  • Mole = 0.005 mole
  • Volume = 25 mL = 25 / 1000 = 0.025 L
  • Molarity of LiBr =?

Molarity = mole / Volume

Molarity of LiBr = 0.005 / 0.025

Molarity of LiBr = 0.2 M

Learn more about molarity: brainly.com/question/10103895

3 0
3 years ago
Describe the difference between a chemical reaction and a physical change.
GREYUIT [131]
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.


Examples of chemical changes are burning, cooking, rusting, and rotting.

Examples of physical changes are boiling, melting, freezing, and shredding.
5 0
3 years ago
Classify the following substances as a Bronsted-Lowry acid, Bronsted-Lowry base, Lewis acid, and/or Lewis base.
Margarita [4]

Answer :

HCl : Bronsted-Lowry acid

BF_3\text{ and }^{+}CCl_3 : Lewis-acid

^-H, CH_2O,^-OCH_3\text{ and }NH_3 : Bronsted-Lowry base

^-H, CH_2O,^-OCH_3,CH_3Cl\text{ and }NH_3 : Lewis-base

Explanation :

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

HCl :

It is a Bronsted-Lowry acid that donates protons.

BF_3\text{ and }^{+}CCl_3 :

It is a Lewis-acid that accepts electron pairs.

^-H, CH_2O,^-OCH_3\text{ and }NH_3 :

It is a Bronsted-Lowry base that accepts protons.

^-H, CH_2O,^-OCH_3,CH_3Cl\text{ and }NH_3 :

It is a Lewis-base that donates electron pairs.

7 0
3 years ago
Give the hybridization shape and bond angle for each carbon in ch3cn
IrinaVladis [17]

Answer:

C-sp, tetrahedral, 180

C-s-p, linear, 180

CH_3-sp3, linear, 109.5

C-sp3, linear, 109.5

C-sp2, tetrahedral, 109.5

CH_3-sp3, tetrahedral, 109.5

CH_3-sp, linear, 180

CH_3-sp2, tetrahedral, 180

Explanation:

8 0
3 years ago
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