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3 years ago

As the concentration of hydrogen ions in solution increases, what happens to the pH?

Chemistry

2 answers:

Flauer [41]3 years ago

8 0

The value of pH decreases and thus because of this we denote the substance to be acidic.

Eva8 [605]3 years ago

5 0

The pH becomes more acidic

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Who can help me on this one ?

Bogdan [553]

Answer:

eight strong bonds to the atoms that it touches and six weaker bonds to the atoms it almost touches. This makes it easier to understand why a metal might prefer the body-centered cubic structure to the hexagonal or cubic closest-packed structure.

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3 years ago

Please help! Thanks!

olya-2409 [2.1K]

Answer:

The deviations are :

The activation energy which changes with temperature
The arrhenius constant which depends on the temperature

Explanation:

There are deviations from the Arrhenius law during the glass transition in all classes of glass-forming matter.

The Arrhenius law predicts that the motion of the structural units (atoms, molecules, ions, etc.) should slow down at a slower rate through the glass transition than is experimentally observed.
In other words, the structural units slow down at a faster rate than is predicted by the Arrhenius law.
This observation is made reasonable assuming that the units must overcome an energy barrier by means of a thermal activation energy.
The thermal energy must be high enough to allow for translational motion of the units which leads to viscous flow of the material.

Both the Arrhenius activation energy and the rate constant k are experimentally determined, and represent macroscopic reaction-specific parameters that are not simply related to threshold energies and the success of individual collisions at the molecular level.
Consider a particular collision (an elementary reaction) between molecules A and B. The collision angle, the relative translational energy, the internal (particularly vibrational) energy will all determine the chance that the collision will produce a product molecule AB.
Macroscopic measurements of E(activation energy) and k(rate constant ) are the result of many individual collisions with differing collision parameters. They are averaged out to a macroscopic quantity.

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3 years ago

What is the balanced equation for the reaction of lead (II) nitrate and sodium chloride?

Sindrei [870]

Answer:

Pb(NO3)2+2NaCl \to PbCl2+NaNO3

Explanation:

Lead(II) nitrate is $Pb(NO_{3})_{2}$

Sodium Chloride is $NaCl$

This is a double displacement reaction. Hence anions or cations of both the compounds are displaced to form the products.

$Pb^{+2}$ and $Cl^{-}$ combine to form PbCl_{2}$

$Na^{+} and \,NO_{3}^{-} combine\, to\, form\, NaNO_{3}$

Therefore the balanced equation is

$Pb(NO_{3})_{2}(aq)+2NaCl(aq) \to PbCl_{2}(s)+2NaNO_{3}(aq)$

3 0

4 years ago

I really need help please someone help me?!. Those are all the questions.

natima [27]

Answer:

question two is most likely you can describe the shape as a twisted ladder, thats what I learned in school.

Explanation:

4 0

3 years ago

Read 2 more answers

containing two H and one Se atoms. How many single bonds, double bonds, triple bonds, and unshared pairs of electrons are on the

butalik [34]

Draw the Lewis structure for the molecule containing two H and one Se atoms.How many single bonds ,double bonds, triple bonds, and unshared pairs of electrons are on the central atom, in that order?

1)3, 0, 0, 1

2)1, 0, 1, 0

3)0, 1, 1, 0

4)0, 2, 0, 0

5)2, 0, 0, 2

6)1, 1, 0, 1

7)4, 0, 0, 0

8)None of these

9)0, 0, 1, 1

10)2, 1, 0, 0

Answer:

The correct answer is (5) 2, 0, 0, 2

(Lewis structure in attached image)

Explanation:

In $H_{2}Se$ , the central atom Se is attached to two H atoms. Se has 6 valence electrons while hydrogen has one valence electron and since there are two hydrogen atoms,there will be 2 valence electrons for two hydrogen atoms. Therefore there are 8 valence electrons in total

Se= 1 × 6 $e^{-}$

H= 2 × 1 $e^{-}$

total valence electrons= 8 $e^{-}$

Thus the lewis structure will be as drawn in the attached image.

There are 2 single bond, no double bond, no triple bond, and 2 unshared pairs of electrons hence the correct answer from the options is 2, 0, 0, 2

5 0

3 years ago

Read 2 more answers