Would precipitation occur when 500 mL of a 0.02M solution of AgNO3 is mixed with 500 mL of a 0.001M solution of NaCl? Show your work.

Answers

Answer 1

Answer: We know,
AgNO3 + NaCl ⇒ NaNO3 + AgCl(s)
The moles of Na+ present:
0.5 L * 0.001 mol/L
= 5 x 10⁻⁴ mol
Moles of Ag+ present:
0.5 * 0.02
= 0.01 mol
The limiting reactant is Na
Therefore, the moles of Ag reacted:
5 x 10⁻⁴
AgCl is insoluble in water; therefore, the AgCl formed will precipitate

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What is the law of conservation of mass? How it is related to balancing chemical equations

Answers

The law of conservation of mass states that whatever goes in comes out the same. That's not the exact concept, but it'll help you remember it.

Here's another way of thinking about it.

Okay, so, we have:

Reactants ⇒ Products

The reactants form into products, but stay the same.

What does this mean?

This means that the mass is conserved. When mass is conserved, the energy is also conserved.

In other words, nothing has changed.

Now, lets relate that to balancing equations.

When you try to balance an equation, what is your goal? ⇒ To get the reactants to equal the products..? Right?

Ah, yes!

Now we have the exact meaning→→→→

The law of conservation of mass states that mass is always conserved in a chemical reaction.

Hope I helped! Please feel free to comment with questions! :)

Law that states that mass is neither created or destroyed in ordinary chemical and physical changes.

Do electrolytes contain ions?

Answers

Yes

Filling in the 20 word ruleeeeeeee jejene jejjene

Answer: yes

Explanation: they contain sodium, potassium, chloride, bicarbonate, calcium, phosphate, magnesium, copper, zinc, manganese, molybdenum, copper, and chromium also.

A substance has an empirical formula of CH2 and a molar mass of 56 grams per mole. The molecular formula for this compound is(1) CH2 (3) C4H8
(2) C4H6 (4) C8H4

Answers

(3) C4H8
C=12, H=1
CH2= 12+2=14
(CH2)n=56g/mol
14n=56
n=4
(CH2)4=C4H8

Answer:

3) C4H8

Explanation:

Castle learning

If an element is located on the far right side of the periodic table, what would one of its physical properties probably be?a. easily drawn into thin wires
b. poor conductor of electricity
c. high density
d. malleable

Answers

If an element is located on the far right side of the periodic table one of its physical properties probably be poor conductor of electricity. The answer is letter B.

Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42−. Separate the ions with a comma only—spaces are not allowed.

Answers

Answer: Na⁺, SO₄ ²⁻.

Justification:

This is just a part of a bigger question.

But the instructions are complete to construct the ions.

The first ion requested is the sodium ion.

The symbol of sodium is Na.

When an electron is removed from the neutral atom, the atom wil result with an excess of protons, which translates onto an excess of positive charge.

Then, to show the new particle you must add a positve sign (+) in the form of superscript.

That is why you write Na⁺. By the way, a positive ion is named cation.

Regarding sulfate ion, it comes from the sulfuric acid, when you remove the two hydrogen atoms, each with a positive charge, then the sulfate ion will stand with a negative charge of 2.

The charge is told to belong to the entire ion, not a particular atom, soy you wirte it with the 2- symbol as a superscript for the entire species:

SO₄ ²⁻. A negative ions is called anion.

The answer, then, is: Na⁺, SO₄ ²⁻.

Writing the ion: Na⁺,SO₄²⁻

Further explanation

Ionic compounds consisting of cations (ions +) and anions (ions -)

The naming is preceded by the cation then the anion with the -ide suffix added

Generally for this ion compound consists of metal elements as cations and non-metals as anions

Metal: cation, positively charged.

Nonmetal: negative anion.

The anion cation's charge is crossed

Example:

Fe₂S₃

Fe charge = 3+

S charge = 2-

The writing of the ionic charge is placed as a superscript behind the molecule/ atom, and the number is written before the positive or negative sign. For a single charge, there is no need to write the number

Example

Cl⁻ (single charge)

Mg²⁺ not Mg⁺²

For the element Na symbol which is group 1A and releases one electron, the symbol writing would be: Na⁺(single charge)

For polyatomic ions, the superscript charge is written after the subscript on the polyatomic element, so it becomes SO₄²⁻

These two ions when combined and bind to Na₂SO₄ (The anion cation's charge is crossed)

if written separately as Na⁺, SO₄²⁻