CHEMISTRY MIDDLE SCHOOL

If a base is added to water, what will occur?hydronium ion concentration is increased.
hydroxide ion concentration is decreased.
[H+] is decreased.
[OH-] is decreased.

Answers

Answer 1

Answer:

Answer:

[H+] is decreased.

Explanation:

Arrhenius Theory:

An acid is a substance which produces one or more hydrogen ions, (H+) in aqueous solution.

Examples:

$HCl(aq)>H^+(aq)+Cl^-(aq)\n\nHBr(aq)>H^+(aq)+Br^- (aq)\n\nH_2 SO_4(aq)>2H^+(aq)+SO_4^2- (aq)\n\nH_3 PO_4(aq) >3H^+ (aq)+PO_4^3-(aq)\n\nCH_3 COOH(aq)>CH_3 COO^- (aq)+H^+ (aq)$

A Base is a substance which produces one or more hydroxyl ion or hydroxide ion (OH-) in aqueous solution.

Examples

$NaOH(s)>Na^+ (aq) + OH^- (aq)\n\nKOH(s)>K^+ (aq) +OH^- (aq)\n\nCa(OH)_2 (s)>Ca^(2+) (aq)+2OH^-(aq)\n\nAl(OH)_3 (s)> Al^(3+)(aq)+ 3OH^- (aq)$

Please note:

(aq) stands for aqueous which means in the presence of water that is, water acts as a solvent

So, on adding a base to the water increase in $[OH^-]$ will take place and this will decrease the Hydrogen ion concentration

Pure water contains $[H^+]=[OH^-]$

if the solution is acidic $[H^+ ]>[OH^- ]$

if the solution is Basic $[H^+ ]<[OH^- ]$

Answer 2

Answer:

Answer:

Explanation:

The first and most obvious statement is that [OH-] is increased, but that is not offered to you.

The second most obvious statement is that the [H+] ion is decreased. That is offered to you. It is C

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Neutrons is the answer

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Answers

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hope this helps

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What examples does
- Making Materials
- Moving Materials
- Removing Waste

Answers

Answer:

You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled

Moving Materials include aluminum foil tape, shipping tape, box tape and duct tape. Moving labels take the guesswork out of the moving process.

When the vapor pressure of a liquid equals the pressure on its surface the liquid will be

Answers

Answer:

The gas above it or boiling

Explanation:

The gas above it or boiling

Which has a greater speed,a heron that travels 600m in 60 seconds or a duck that travels 60m in 5 seconds? explain

Answers

In order to find out the answer to this problem, you need to know how to find the unit rate. A unit rate a rate that has a denominator of 1. You find the unit rate because the problem is asking you to find the faster speed, but the ratios are different.
So 600m in 60 sec you divide both by 60. It comes out as 10m in 1 sec for the heron.
60m in 5 sec is 12m in 1 sec for the duck.
Compare the heron to duck. The heron travels faster.
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Which of the following is NOT correct about elements?(10 Points)

A. Elements cannot be broken down into simpler substances.

B. Elements are represented by chemical formulas.

C. Elements are pure substances.

D.Elements can combine chemically to form compounds.

Answers

Answer:

It is B.

All the other answers are true.

A element can not be simpler

Final answer:

The correct answer is B. Elements are represented by chemical formulas.

Explanation:

Out of the given options, the correct answer is B. Elements are represented by chemical formulas.

Chemical formulas are used to represent compounds, not elements. Elements are pure substances that are made up of only one type of atom and cannot be broken down into simpler substances. They are represented by their chemical symbols, such as H for hydrogen and O for oxygen.

For example, water is a compound made up of two elements: hydrogen and oxygen. The chemical formula for water is H2O, where H represents hydrogen and O represents oxygen.