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3 years ago

30 points please help!!!!!!!!

Chemistry

1 answer:

sweet [91]3 years ago

8 0

pH 3 = 10 times of pH 4 in terms of H⁺ concentration

<h3>Further explanation </h3>

pH is the degree of acidity of a solution that depends on the concentration of H⁺ ion. The greater the value the more acidic the solution and the smaller the pH.

pH = - log [H⁺]

So that the two quantities between pH and [H⁺] are inversely proportional because they are associated with negative values.

A solution whose value is different by n has a difference in the concentration of H⁺ ion of 10ⁿ.

So pH 3 and pH 4 have a difference in the concentration of H⁺ ion of 10¹ = 10

pH 3 = -log[10⁻³]

pH 4 = - log[10⁻⁴]

pH 3 = 10 times of pH 4 in terms of H⁺ concentration

And pH 3 is stronger in acid than pH 4

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Brainliest Available! Thank you in advance!

liraira [26]

Answer:

3.0×10⁻¹³ M

Explanation:

The solubility product Ksp is the product of the concentrations of the ions involved. This relation can be used to find the solubility of interest.

<h3>Equation</h3>

The power of each concentration in the equation for Ksp is the coefficient of the species in the balanced equation.

Ksp = [Al₃⁺³]×[OH⁻]³

<h3>Solving for [Al₃⁺³]</h3>

The initial concentration [OH⁻] is that in water, 10⁻⁷ M. The reaction equation tells us there are 3 OH ions for each Al₃ ion. If x is the concentration [Al₃⁺³], then the reaction increases the concentration [OH⁻] by 3x.

This means the solubility product equation is ...

Ksp = x(10⁻⁷ +3x)³

For the given Ksp = 3×10⁻³⁴, we can estimate the value of x will be less than 10⁻⁸. This means the sum will be dominated by the 10⁻⁷ term, and we can figure x from ...

3.0×10⁻³⁴ = x(10⁻⁷)³

Then x = [Al₃⁺³] will be ...

$[\text{Al}_3^{\,+3}]=\dfrac{3.0\times10^{-34}}{10^{-21}}\approx \boxed{3.0\times10^{-13}\qquad\text{moles per liter}}$

We note this value is significantly less than 10⁻⁷, so our assumption that it could be neglected in the original Ksp equation is substantiated.

<em>Additional comment</em>

The attachment shows the solution of the 4th-degree Ksp equation in x. The only positive real root (on the bottom line) rounds to 3.0×10^-13.

6 0

2 years ago

Read 2 more answers

7.60 moles of magnesium perchlorate 3 significant figures

katen-ka-za [31]

The number of moles of Mg, Cl, and O atoms is 7.60 moles of magnesium perchlorate 7.60, 15.2, and 60.8 moles respectively.

Mole is a standard scientific unit that is used to measure large quantities of small things such as atoms, molecules, atoms, etc. A mole is the amount of a substance that contains 6.023× 10²³ particles of a substance.

The number 6.023× 10²³ is also known as the Avogadro number and is designated by the symbol $N_A$ .

The total number of atoms in every molecule of magnesium perchlorate needs to calculate. The chemical formula of the magnesium perchlorate is Mg(ClO₄)₂.

Therefore the number of atoms of magnesium, chlorine, and oxygen are 1, 2, and 8 respectively. Then, the number of moles of Mg, Cl, and O in 7.60 moles of magnesium perchlorate will be equal to :

Number of moles of Mg = 1 × 7.60 moles = 7.60 mol

Number of moles of Mg = 2 × 7.60 moles = 15.2 mol

Number of moles of Mg = 8 × 7.60 moles = 60.8 mol

Therefore, the number of moles of Mg, Cl, and O in 7.60 moles of Mg(ClO₄)₂ is 7.60, 15.2, and 60.8 moles respectively.

Learn more about the mole concept, here:

brainly.com/question/22540912

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Your question is incomplete, but most probably your full question was,

Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 2.60 moles of magnesium perchlorate, mg(clo4)2. express the number of moles of Mg, Cl, and O atoms numerically, separated by commas.

6 0

1 year ago

For the reaction of nitrogen gas and hydrogen gas to make methane, describe FOUR stresses that would shift the equilibrium to th

shusha [124]

Answer:

- Addition of NH₃(g)

- Removal of N₂(g)

- Increase of temperature

- Pressure decrease

Explanation:

According to Le Chatelier's principle, if we apply an stress to a reaction at equilibrium, the system will try to shift the equilibrium in order to decrease the stress. If we add reactants, the equilibrium will shift toward the formation of more products (to the consumption of reactants) and vice versa.

The stresses we can apply to this equilibrium are the following:

- Addition of NH₃(g) : it is a product, thus its addition will result in a shift toward reactants.

- Removal of N₂(g): it is a reactant, thus its removal from the reaction mixture will result in a shift toward reactants.

- Increase of temperature: the reaction is <u>exothermic</u>, so it releases energy. <u>Energy is a product</u>. If we add energy (increase the temperature), we are adding a product, so the equilibrium will shift toward the reactants.

- Pressure decrease: because both reactants and products are in the gas phase. A decrease in pressure shifts an equilibrium to the side of the reaction with greater number of moles of gas. In this case, the reactants side has greater number of moles of gas (1 mol + 3 moles= 4 moles) than the products side (2 moles). Thus, the equilibrum will shift toward reactants.

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4 years ago

What causes heartburn? How do antacids work to relieve heartburn? What are the key

Sophie [7]

Answer:

<h3>Antacids use a combination of calcium, magnesium, and aluminum salts as their active ingredients. These medications work by neutralizing the acid in the stomach. They also inhibit pepsin , which is an enzyme that plays a role in protein digestion.</h3>

Hope this answer helps

Mark me as brainlest

7 0

3 years ago

Draw the salt produced in this reaction. include charges.

Svetach [21]

Since no equation is being given, I will explain how to balance a chemical reaction. The key in the balancing of chemical reaction is to make sure that you got the exact chemical formula of the substance that is reacting and the yielded product. After getting the formula, identify first the hardest element/atom to be balanced such as Na, Zn, Cl, etc. Then proceed to the easier ones such as O, H. Make sure to not the atoms present in the molecule of the substance. For example Al(s) + HCl(aq) à AlCl3(aq) + H2(g). the hardest element here is the Cl. Observe that there are 3Cls in the product side so add 3 to the HCl. However, it would not balance the H2 in the product side so you increase the addition to AlCl3, add 2. Now you have 6 atoms of Cl, add this to the reactant side, you get 6HCl. Since you have 6Hs, add 3 to H2 (3 multiplied by 2 gives 6). Then Al has 2 atoms in the product side, add 2 to the reactant side. The balance chemical reaction is 2Al(s) + 6HCl(aq) à 2AlCl3(aq) + 3H2(g).

7 0

4 years ago