CHEMISTRY HIGH SCHOOL

When dissolved in water, an Arrhenius base yields(1) hydrogen ions (2) hydronium ions(3) hydroxide ions (4) oxide ions

Answers

Answer 1
Answer: Arrhenius bases yield hydroxide ions when in solution.  Arrhenius acids on the other hand yield hydrogen ions (which is sometimes called hydronium since the H⁺ turns to H₃O⁺ in water).

I hope this helps.  Let me know if anything is unclear.

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Which of the following examples is a compound containing an ionic bond?A. O2
B. H2O
C. CaO
D. CH4

Answers

Answer:

caO

Explanation:

Final answer:

Among the given options, Calcium Oxide (CaO) contains an ionic bond. This bond is formed through the transfer of two electrons from a calcium atom to an oxygen atom.

Explanation:

The question seeks to identify the compound that contains an ionic bond from the provided options. Ionic bonds are usually formed between metals and non-metals. In these cases, the metal atom donates an electron to the non-metal atom, leading to the formation of a positively charged cation and a negatively charged anion. These oppositely charged ions then attract each other, forming an ionic bond.

Let's look at the options:

  • A. O2 - Oxygen molecules are formed by the sharing of electrons between two oxygen atoms, which is a covalent bond, not ionic.
  • B. H2O - water contains two hydrogen atoms bonded to an oxygen atom. These are covalent bonds as well.
  • C. CH4 - Methane, comprised of carbon and hydrogen atoms, involves covalent bonding.
  • D. CaO - Calcium Oxide is formed by the transfer of two electrons from a calcium atom to an oxygen atom, resulting in an ionic bond. Therefore, CaO is the correct answer.

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What is the approximate pH of a 5x10-3 MHCl solution?​

Answers

If I’m correct “2.3” :)

Final answer:

The approximate pH of a 5x10-3 MHCl solution is 3.

Explanation:

The pH of a solution can be calculated using the formula pH = -log[H+], where [H+] represents the concentration of hydrogen ions in the solution. In this case, we have an HCl solution with a concentration of 5x10-3 M. To find the pH, we need to convert the concentration into the molarity of H+ ions. Since HCl is a strong acid, it dissociates completely in water, meaning that 1 molecule of HCl yields 1 H+ ion. Therefore, the molarity of H+ ions is also 5x10-3 M. Plugging this value into the pH formula, we get:



pH = -log(5x10-3)



pH = -(-3) = 3



Therefore, the approximate pH of the 5x10-3 M HCl solution is 3.

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It's urgent. I need help to know the oxidation numbers and what is the oxidation and reduction part of this equation Fe + H2SO4= Fe2(SO4)3 + H2

Answers

In the given equation: Fe + H2SO4 = Fe2(SO4)3 + H2

To determine the oxidation numbers, we assign oxidation numbers to each element in the equation.

1. Fe: The oxidation number of Fe is 0 since it is in its elemental form.

2. H2SO4:
- H has an oxidation number of +1.
- S has an oxidation number of +6 since it is in the sulfate ion (SO4)2-.
- O has an oxidation number of -2.

3. Fe2(SO4)3:
- Fe has an oxidation number of +3 since it is in the Fe2+ ion.
- S has an oxidation number of +6 since it is in the sulfate ion (SO4)2-.
- O has an oxidation number of -2.

4. H2:
- H has an oxidation number of 0 since it is in its elemental form.

Now, let's analyze the oxidation and reduction parts of the equation:

Oxidation: Fe is oxidized from an oxidation number of 0 to +3 in Fe2(SO4)3.

Reduction: H2SO4 is reduced. The sulfur (S) in H2SO4 goes from an oxidation number of +6 to +4 in Fe2(SO4)3, and the hydrogen (H) in H2SO4 goes from an oxidation number of +1 to 0 in H2.

Overall, in this equation, Fe is oxidized, and H2SO4 is reduced.

1) Write the word and symbol equation to show what happens when water is added to Calcium Oxide.2) Write word and symbol equations for the thermal decomposition of limestone.

Answers

2. caco3 -> cao + co2
    limestone -> calcium oxide + carbon dioxide

A certain compound is made up of one phosphorus (P) atom, three chlorine (Cl) atoms, and one oxygen (O) atom. What is the chemical formula of this compound?

Answers

Ok so we know that all of these are non metals therefore they will bond using covalent bonds.
Phoshorus can have 3 bonds Chlorine can have 1 bond and Oxygen can two bonds.
Cl-P=O
The chemical formula I belive is PClO hope this helps :).

MethaneProteinAlcohol can be found in beer, wine and liquor.

Answers

The correct answer is alcohol. It is the common component in beer, wine and any liquor. Usually, alcohol is produced by fermentation of organic products containing glucose to produce alcohol, specifically ethanol, as the important product and the by-products water and carbon dioxide. 

Answer:

The correct answer is alcohol. It is the common component in beer, wine and any liquor. Usually, alcohol is produced by fermentation of organic products containing glucose to produce alcohol, specifically ethanol, as the important product and the by-products water and carbon dioxide.

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