All categories

3 years ago

Which of the following is a true statement about acids and bases?

Chemistry

2 answers:

maks197457 [2]3 years ago

5 0

Answer: The correct answer is 'a base gives off hydroxide ions'.

Explanation:

Bases have pH more than seven.
They give hydroxide ions, $OH^-$ .

$BOH(aq)\rightarrow B^+(aq)+OH^-(aq)$

Acids have pH lower than seven.
They give hydronium ions, $H^+$ .

$HA(aq)\rightarrow H^+(aq)+A^-(aq)$

juin [17]3 years ago

3 0

Answer: A base gives off hydroxide ions.

Explanation: According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions $(OH^-)$ when dissolved in water and an acid is defined as a substance which donates hydronium ions $(H_3O^+)$ in water.

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.

Acids have pH values ranging from 1 to 6.9, neutral solutions have pH of 7 and bases have pH ranging from 7.1 to 14.

A substance that increases the hydroxide ion concentration of a solution is an Arrhenius base.

$NaOH\rightarrow Na^++OH^-$

You might be interested in

1. Draw the Dot Structure for Na!

stepladder [879]

Answer:

Na ·

Explanation:

Hello!

In this case, since the Lewis dot structure of any element illustrates the number of valence electrons at the outer shell; we can set up the electron configuration of sodium to obtain:

$Na^1^1\rightarrow 1s^2,2s^2,2p^6,3s^1$

We can see there is only one valence electron, for that reason the Lewis dot structure is:

Na ·

Whereas the dot represents the valence electron.

Best regards!

4 0

3 years ago

Assume that your electrical power company gets its energy from a hydroelectric dam. Outline all of the energy changes that occur

Rina8888 [55]

Answer:

See explanation.

Explanation:

This isn't chemistry. Its physics. Kinetic energy (water) to electric energy (dam) as the hydroelectric dam works. Then, as the current travels from the plant to your crib, electric energy to heat energy (wire resistance). Then when you are using the dryer electric energy to heat energy (hot air) and sound energy (air particles vibrate due to the heat energy).

5 0

2 years ago

What is science......?

den301095 [7]

$\huge \underbrace \mathfrak \blue{Answer}$

Science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe. The earliest roots of science can be traced to Ancient Egypt and Mesopotamia in around 3000 to 1200 BCE.

$\\$

5 0

3 years ago

Read 2 more answers

.Florida phosphate accounts for ___ of the world's fertilizer supply?Immersive Reader

Stells [14]

Answer: 25%

Explanation: According to the Florida Industrial and Phosphate Research Institute, Florida’s phosphate mining accounts for about 75% of the phosphate used in the United States, as well as about 25% phosphate used around the world. Although first mined in England in 1847, and used as fertilizer, In 1881, a civilian employee, J Francis Le Baron discovered Phosphate pebbles in peace river, and then, a hard rock phosphate district was discovered in north central Florida after that which began the Phosphate mining industry in Florida. Phosphorus rock supplies the phosphorus element in the fertilizer mix of nitrogen-phosphorus-potassium that is used as fertilizer to aid in growth of plants.

4 0

3 years ago

Q #13 How many moles of MgCl2 are there in 350. g of compound?

Vaselesa [24]

Answer:

3.67 moles

Step-by-step explanation:

We need to find out the number of $MgCl_2$ moles present in 350 grams of a compound.