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kkurt [141]
3 years ago
9

Consider two separate aqueous solutions: one of a weak acid HA and one of HCl. Assuming you started with 10 molecules of HA in o

ne beaker and 10 molecules of HCl in the other beaker.
What are the major species in each beaker?
Chemistry
1 answer:
Vadim26 [7]3 years ago
8 0

Answer:

The answer is given below:

Explanation:

Strong acids have the ability to dissociate quickly as compared to the weak acids which dissociates slowly and can do that up to a certain level.

HCl is a strong acid and HA as stated in the statement is a weak acid.

So, in the beaker which contains HCl will have:

  • H+
  • Cl-
  • HCl
  • Water or H2O

In the beaker with HA will have:

  • H+
  • A-
  • HA
  • Water or H2O
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Covert to scientific notation.
gtnhenbr [62]

Answer:

19) 3.6920 × 10⁻⁵

20) 4.059× 10²

21) 2.46810121416 × 10³

22)  1.0000× 10⁻³

Explanation:

Scientific notation is the way to express the large value in short form.

The number in scientific notation have two parts.

The digits (decimal point will place after first digit)

× 10 ( the power which put the decimal point where it should be)

For example:

0.000036920

In scientific notation =  3.6920 × 10⁻⁵

405.9

In scientific notation  = 4.059× 10²

2468.10121416

In scientific notation  = 2.46810121416 × 10³

0.0010000

In scientific notation  = 1.0000× 10⁻³

8 0
3 years ago
How does the crystalline structure of a metal differ from the structure of an ionic compound, such as sodium chloride or cesium
Sergio [31]

Answer:

The metal cube lattice is made of only one kind of atom.

Explanation:

As we know that metallic crystals are made up of only one kind of element.  A metal crystal is actually a huge sea of positive charges embedded in the layers of negative charges (electrons). The whole crystal is made up of same kind of atoms, e.g crystals of gold, crystals of iron.

If we talk about structure of metallic crystal, it can be body centered cubic, simple cubic, hexagonal or close cubic packing.

Now, coming towards the ionic crystals, we know that they are basically the crystals of ionic compounds like sodium chloride or cesium chloride. These crystals are formed due to ionic bonding between two or more than two kinds of elements/atoms. It is not possible for an ionic crystal to be composed of only one kind of atom. As far as structure is concerned, they can have different structure based on bonding between atoms in an ionic compound, e.g NaCl has octahedral geometry.

Therefore, it is very evident that best option is A.

7 0
3 years ago
What's the word that is " these break food into pieces
Flauer [41]
Well that would be teeth unless it's some type of silverware
3 0
3 years ago
Which of the following does NOT indicate that a chemical change may have taken place?
Mamont248 [21]
I believe it is phase change because of how that can also happen in a physical change.
4 0
3 years ago
What is the net ionic equation of H3PO4(aq) + Ca(OH)2(aq) yields Ca3(PO4)2(aq) + H2O(l)
aalyn [17]

Answer:

The net ionic equation is:

6 OH⁻(aq) + 6 H⁺(aq) ⇒ 6 H₂O (l)

Explanation:

First it is convenient to determine the cation and the anion in each compound. Cations are the positive ions of a compound and are usually metals. Anions are the negative ions of a compound and are nonmetals.For that it is important to recognize polyatomic ions in a reaction. Polyatomic ions are charged molecules that bind so strongly that they cannot disassociate during chemical reactions. In other words, polyatomic ions are groups of two or more atoms that are chemically linked. These have a specific load and do not separate into individual components. Polyatomic ions can have both positive and negative charges. Some of the most common polyatomic ions are CO₃²⁻, NO₃⁻, NO₂⁻, SO₄²⁻, SO₃²⁻, ClO₃⁻, PO₄³⁻ and OH⁻.

Then you must make sure that the initial equation is completely balanced. To balance an equation, you must add coefficients in front of the compounds to match the amount of atoms of each element on both sides of the equation.

In this case, the final balanced equation after balancing is:

3 Ca(OH)₂(aq) + 2 H₃PO₄(aq) ⇒ 6 H₂O(l) + Ca₃(PO₄)₂(s)

When a species or compound dissociates, it separates into its positive (cation) and negative (anion) components. These will be the components that are balanced at the end for the net ionic equation.

Given that strong acids such as H₃PO₄ and strong bases such as Ca(OH)₂ are completely dissociated, in addition to everything previously mentioned related to polyatomic ions, the net ionic equation will be:

3 Ca⁺² (aq) + 6 OH⁻(aq) + 6 H⁺(aq) + 2 PO₄⁻³(aq) ⇒ 6 H₂O (l)+3 Ca⁺² (aq) + 2 PO₄⁻³ (aq)

In this case it was taken into account that the coefficients located in front of each molecule indicate the amount of each molecule for the reaction and that the subscripts next to each atom or ion is the number of atoms or ions in the equation. By multiplying the coefficient mentioned by the subscript, you get the amount of each element or ion present in the reaction.

The spectator ions are those that are present on both sides of the reaction and are not changed by the reaction, that is, they are present in exactly the same amount on both sides of the equation. In this way, they can be canceled from both sides of the reaction. The spectator ions in this case are PO₄³⁻(aq) and Ca²⁺(aq).

This leaves you with the net ionic equation:

<u><em>6 OH⁻(aq) + 6 H⁺(aq) ⇒ 6 H₂O (l)</em></u>

7 0
3 years ago
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