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3 years ago

Determine whether the following pairs of elements can form ionic compounds.

Chemistry

1 answer:

hoa [83]3 years ago

4 0

Answer:

• Sodium and oxygen

• Manganese and chlorine

• Oxygen and calcium

• Chlorine and sodium

Explanation:

Ionic compounds are formed when a very electronegative element (that is, that has high electronic affinity), comes into contact with a low electronegative or very electropositive element (it is said to have low ionization potential). Thus, an electron transfer takes place, from the electropositive element, remaining with less electrons than its original form and forming a cation, towards the most electronegative, which is left with more electrons than the initial ones, and forms an anion. The difference in charges between the elements causes the union to occur due to the opposite electrostatic forces between them.

This type of bonding occurs between metals with nonmetals, because among these there is a large difference in electronegativity, and the transfer of electrons occurs from metals, which form cations, to nonmetals, which remain as anions.

Therefore, the pairs of elements that can form this type of compound are the pairs that contain a metal and a nonmetal. They are:

• Sodium and oxygen

• Manganese and chlorine

• Oxygen and calcium

• Chlorine and sodium

The other pairs described in the statement (Nitrogen and iodine - Potassium and calcium), are formed by elements of the same family (two nonmetals and two metals, respectively), so there is no significant electronegativity difference so that ionic bonding occurs.

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Phosphine, an extremely poisonous and highly reactive gas, will react with oxygen to form tetraphosphorus decaoxide and water. P

pantera1 [17]

Answer:

The mass of P₄O₁₀ (s) formed is 471.03 g

Explanation:

4PH₃(g) + 8O₂(g) → P₄O₁₀ (s) + 6H₂O (g)

This is the ballanced equation.

Every 4 moles of phosphine, 1 mol of tetraphosphorus decaoxide is generated.

Moles of PH₃ = Mass PH₃ / Molar mass PH₃

Moles PH₃ = 225 g / 33.9 g/m

Moles PH₃ = 6.63 moles

So the rule of three, will be:

If 4 moles of PH₃ generate 1 mol P₄O₁₀

Then, 6.63 moles of PH₃ generate (6.63 .1)/4 = 1.66 moles

If we want to know the mass:

Moles . Molar mass = mass

Molar mass P₄O₁₀ = 283.88 g/m

1.66m . 283.88 g/m = 471.03 g

3 0

3 years ago

Thermal energy added to a substance that is not changing state causes the substance’s temperature to

tatyana61 [14]

Answer:

increase

Explanation:

Conduction involves the transfer of electric charge or thermal energy due to the movement of particles. When the conduction relates to electric charge, it is known as electrical conduction while when it relates to thermal energy, it is known as heat conduction. Conductors include metal, steel, aluminum, copper, frying pan, pot, spoon etc.

In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.

Hence, thermal energy added to a substance that is not changing state causes the substance’s temperature to increase because it would absorb energy in the form of heat.

6 0

3 years ago

Balance the following half-reaction: (acidic) VO2+(aq) → V3+(aq) Express your answer as a half-reaction. Identify all of the pha

ivolga24 [154]

Answer:

The balanced half reaction in an acidic medium is :

$VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)$

Explanation:

$VO^{2+}(aq)\rightarrow V^{3+}(aq)$

While balancing the half-reaction in an acidic medium, we will first balance oxygen atoms by adding water:

1) Adding 1 water molecule on product side to balance oxygen atoms.

$VO^{2+}(aq)\rightarrow V^{3+}(aq)+H_2O(l)$

Now balance hydrogen atom by adding $H^+ ions$ .

2) Adding 2 hydrogen ions on reactant side to balance hydrogen atoms.

$VO^{2+}(aq)+2H^+(aq)\rightarrow V^{3+}(aq)+H_2O(l)$

Now balance the charge adding electrons on the side where positive charge is mor.

3) Adding 1 electrons on reactant side to balance charge of the overall reaction:

$VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)$

The balanced half reaction in an acidic medium is :

$VO^{2+}(aq)+2H^+(aq)+e^-\rightarrow V^{3+}(aq)+H_2O(l)$

6 0

3 years ago

If the pOH increases is a solution getting more basic or less basic?

sveticcg [70]

Answer:

Increases

Explanation:

Both acids and bases can measured

using the pH or pOH scale. Both

scales provide a measure of either

the H+ concentration or the OHconcentration.

Notice that each scale shows were

acids and bases both are located.

• When acids are measured, the

pH is less than 7, but the pOH

is greater than 7.

• When bases are measured,

the pH is greater than 7, but

the pOH is less than 7.

Both scales are dependent on what

ion you are measuring

6 0

3 years ago

What is the concentration of kl solution if 20.68g of solute was added to enough water to form 100ml solution?

rewona [7]

Answer:

1.25 M

Explanation:

Step 1: Given data

Mass of KI (solute): 20.68 g

Volume of the solution: 100 mL (0.100 L)

Step 2: Calculate the moles of solute

The molar mass of KI is 166.00 g/mol.

20.68 g × 1 mol/166.00 g = 0.1246 mol

Step 3: Calculate the molar concentration of KI

Molarity is equal to the moles of solute divided by the liters of solution.

M = 0.1246 mol/0.100 L= 1.25 M

5 0

3 years ago