Which of the following is an example of an Arrhenius base? KCl Ca(OH)2 HCl

1 answer:

3 0

An Arrhenius base is a substance that when dissolved in an aqueous solution, increases the concentration of hydroxide (-OH) in the solution. When Ca(OH)2 dissolves in water: Ca(OH)2 ⇒ Ca2- + 2OH-, thus increases the concentration of OH, so Ca(OH)2 is an Arrhenius base. KCl⇒K+ + Cl-, HCl⇒H+ +Cl-, they both don't increase -OH concentration, so they are not Arrhenius base. In fact HCl is an Arrhenius acid.

You might be interested in

A 25 liter gas cylinder contains 10 mole of carbon dioxide. Calculate the pressure, in atm, of the gas at 325K.

Arada [10]

<u>Answer:</u> The pressure of carbon dioxide gas is 11 atm

<u>Explanation:</u>

To calculate the pressure of gas, we use the equation given by ideal gas equation:

PV = nRT

where,

P = pressure of the gas = ?

V = Volume of gas = 25 L

n = number of moles of gas = 10 mole

R = Gas constant = $0.0821\text{ L atm }mol^{-1}K^{-1}$

T = temperature of the gas = 325 K

Putting values in above equation, we get:

$P\times 25L=10mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 325K\\\\P=11atm$

Hence, the pressure of carbon dioxide gas is 11 atm

4 0

3 years ago

Aluminum has a density of 2.70 g/mL. Calculate the mass (in grams) of a piece of aluminum having a volume of 353 mL .

vredina [299]

Mass=density·volume. The density is 2.70g/mL and the volume is 353mL. So you would multiply 2.70g/mL by 353mL which will give you 953.1g. Hope that helps :)

7 0

3 years ago

What is the mass number of C12,C13 and C14

Elena L [17]

Carbon-13 and Carbon-14 are isotopes of the element carbon. All carbon atoms have 6 protons in their nucleus and most have 6 neutrons. Since the mass number consists of # of protons + # of neutrons, Carbon 12 has an atomic mass of 12 ( = 6 protons + 6 neutrons). Carbon-13 atoms have one extra neutron, giving it a total of 7 neutrons. Carbon-14 atoms have two extra neutrons, giving them a total of 8 neutrons. Therefore the mass number of C-12= 12, C-13= 13 and C-14= 14.

3 0

4 years ago

An orbital is a region in an atom where there is a high probability of finding _________

lukranit [14]

Answer:

its electron

Explanation:

i dont have an explanation but i hope you get it right

7 0

3 years ago

How many electrons are in the outermost energy shell of a calcium atom?

ASHA 777 [7]

There are two electrons in the outermost shell of calcium

4 0

3 years ago