All categories

3 years ago

Examples of hard water

Chemistry

2 answers:

Ksju [112]3 years ago

3 0

Answer:

lake water, swamp water, like, any dirty and unpurified forms of water is hard water

Explanation:

ratelena [41]3 years ago

3 0

Answer:

Water is considered hard when it contains a large amount of the cations (positively-charged ions) Ca2+, Mg2+, and/or Fe3+. These ions are typically introduced into a water supply when the water drips through a mineral. Limestone is an example of a mineral that contains a source of calcium.

Explanation:

You might be interested in

Consider the diagram of the Earth, Sun, and Moon system. Which phenomenon is MOST DIRECTLY caused by the revolution of the Earth

zlopas [31]

It is commonly known that our Galaxy rotates upon the sun because of gravity. The diagrams' arrows sort of describe it. Id suggest Gravity as the answer.

5 0

3 years ago

Saponification is a chemical reaction _____. A. due to the presence of a strong organic acid. B. that results in an alcohol and

dezoksy [38]

Answer:

that results in an alcohol and a carboxylic acid.

Explanation:

Saponification is a chemical reaction process of alkaline hydrolysis of esters(R'COOR group) by which soap is obtained.

For Example, when a base such as sodium hydroxide [NaOH] is used to hydrolyze an ester, the products are a carboxylate salt and an alcohol. Because soaps are prepared by the alkaline hydrolysis of fats and oils.

In a saponification reaction, alkaline hydrolysis of fats and oils with sodium hydroxide yields propane-1,2,3-triol and the corresponding sodium salts of the component fatty acids.

i.e Fat or oil + caustic alkali ⇒ Soap + propane-1,2,3-triol

As a specific example, ethyl acetate and NaOH react to form sodium acetate and ethanol:

The reaction goes to completion in the image below:

8 0

3 years ago

Small quantities of hydrogen gas can be prepared in the lab by addition of hydrochloric acid to zinc. The gas is typically colle

madam [21]

Answer:

0.214 L

Explanation:

Step 1: Write the balanced equation

This is a single displacement reaction.

Zn(s) + 2 HCl(aq) ⇒ ZnCl₂(aq) + H₂(g)

Step 2: Calculate the moles corresponding to 0.625 g of Zn

The molar mass of Zn is 65.38 g/mol.

0.625 g × 1 mol/65.38 g = 9.56 × 10⁻³ mol

Step 3: Calculate the moles of H₂ produced from 9.56 × 10⁻³ moles of Zn

The molar ratio of Zn to H₂ is 1:1. The moles of H₂ produced are 1/1 × 9.56 × 10⁻³ mol = 9.56 × 10⁻³ mol.

Step 4: Calculate the volume occupied by 9.56 × 10⁻³ moles of hydrogen

Assuming standard pressure and temperature, 1 mole of hydrogen occupies 22.4 L.

9.56 × 10⁻³ mol × 22.4 L/1 mol = 0.214 L

8 0

3 years ago

What is 2(NH,4)Cr,2 O,7

Vitek1552 [10]

oxidation-reduction.

4 0

3 years ago

at room temperature table salt is a solid and mercury is a liquid. what conclusion can you draw about the melting points of thes

Tju [1.3M]

Table slat has a low melting pointy while mercury has a high one
<span />

5 0

4 years ago

Examples of hard water​

Examples of hard water