All categories

3 years ago

Help!!! Acids and Bases

Chemistry

2 answers:

Daniel [21]3 years ago

8 0

Answer:

In this theory, an acid is a substance that can release a proton (like in the Arrhenius theory) and a base is a substance that can accept a proton. A basic salt, such as Na+F-, generates OH- ions in water by taking protons from water itself (to make HF)

valentina_108 [34]3 years ago

4 0

ACID: A substance that accepts a lone pair of electrons

BASE: A substance that donates a lone pair of electrons

:D

You might be interested in

Which element is a halogen? argon bromine calcium lithium

almond37 [142]

It is (CI) bromine
because, Halogen element, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts).

6 0

3 years ago

Read 2 more answers

A 5.00g quantity of a diprotic acid was dissolved in water and made up exactly 250 mL. Calculate the molar mass if the acid is 2

MAXImum [283]

Answer:

The molar mass of the diprotic acid is 90.10 g/mol.

Explanation:

The acid is 25.0 mL of this solution required 11.1 mL of 1.00 KOH for neutralization.

$H_2A+2KOH\rightarrow K_2A+2H_2O$

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$ ( neutralization )

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of diprotic acid

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is KOH.

We are given:

$n_1=2\\M_1=?\\V_1=25 mL\\n_2=1\\M_2=1.00 M\\V_2=11.1 mL$

Putting values in above equation, we get:

$2\times M_1\times 25=1\times 1.00\times 11.1}$

$M_1=\frac{1\times 1.00\times 11.1}{2\times 25}=0.222 M$

Molarity of acid solution = 0.222 M =0.222 mol/L

Volume of original solution = 250 mL = 0.250 L ( 1 mL = 0.001 L)

Moles of diprotic acid in 0.250 L solution :

$=0.222 mol/L\times 0.250 L=0.0555 mol$

Mass of diprotic acid = m = 5.00 g

$Moles(n)=\frac{mass(m)}{\text{Molar mass(M)}}$

$M=\frac{m}{n}=\frac{5.00 g}{0.0555 mol}=90.10 g/mol$

The molar mass of the diprotic acid is 90.10 g/mol.

5 0

3 years ago

What is the wavelength if the frequency is 29.2 hz?

ZanzabumX [31]

Answer : The wavelength is $1.027\times 10^7m$

Solution : Given,

frequency = 29.2 Hz

Formula used :

$\nu=\frac{c}{\lambda}\\\lambda=\frac{c}{\nu}$

where,

$\nu$ = frequency

$\lambda$ = wavelength

c = speed of light = $3\times 10^8m/s$

Now put all the given values in this formula, we get the wavelength.

$\lambda=\frac{3\times 10^8m/s}{29.2Hz}=0.1027\times 10^8m=1.027\times 10^7m$ $(1Hz=1s^{-1})$

Therefore, the wavelength is $1.027\times 10^7m$

8 0

3 years ago

if a penny is 1.15 mm thick how many pennies are needed to reach the ceiling in a room where the height is 2.30 m

saw5 [17]

two penny's = 2.30 m cause one penny is 1.15 m so add another to get 2.30 m.

6 0

3 years ago

Compare and contrast ionic, covalent, and metallic bonds. Identify at least one similarity or difference between each pair of bo

Aloiza [94]

An Ionic Bond is a chemical bond that forms between non-metal, and metal ions through electrostatic attraction.

A Covalent bond is the sharing pair of of atoms and electrons.

Metallic bond is a chemical bond between charecteristics of metals, where mobile valence electrons are shared between atoms in a stable crystalline.

5 0

4 years ago

Read 2 more answers