Answer:
The correct option is;
Group 12
Explanation:
A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and which forms a bright red compound with sulfur is mercury, Hg
The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.
H₂SO₄ + 2NH₄OH → (NH₄)₂SO₄ + 2H₂O
Explanation:
Unbalanced reaction equation:
H₂SO₄ + NH₄OH → (NH₄)₂SO₄ + H₂O
We can use a simple mathematical approach to balance this equation by solving simple algebraic equations.
aH₂SO₄ + bNH₄OH → c(NH₄)₂SO₄ + dH₂O
a,b,c and d are simple coefficients that will balance the equation:
Conservation of H: 2a + 5b = 8c + 2d
S: a = c
O: 4a + b = 4c + d
N: b = 2c
lets assume that a = 1
c= 1
b = 2
Solving for d from 4a + b = 4c + d
d = 4a + b -4c = 4(1) + 2 - 4(1) = 2
H₂SO₄ + 2NH₄OH → (NH₄)₂SO₄ + 2H₂O
Learn more:
Balancing of equations brainly.com/question/6078553
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<span>2.40 - 1.68 =0.72 g of oxigen
moles = 0.72/16 g/mol=0.045
moles x = 1.68/ 55.9=0.03
0.03/0.03 = 1 = x
0.045 / 0.03 = 1.5 = O
to get whole numbers multiply by 2
x2O3
X2O3 +3 CO = 2 X + 3 CO2</span>
Answer: The ratio of conjugate base to weak acid in the buffer system is 758 : 1
Explanation:
The dissociation constant for acid = 
pH = 6.34
First we have to calculate the value of 
.
The expression used for the calculation of is,
Now put the value of 
in this expression, we get:
Now we have to calculate the ratio of conjugate base to weak acid in the buffer system
Using Henderson Hesselbach equation :
![pH=pK_a+\log \frac{[\text {conjugate base}]}{[Acid]}](https://tex.z-dn.net/?f=pH%3DpK_a%2B%5Clog%20%5Cfrac%7B%5B%5Ctext%20%7Bconjugate%20base%7D%5D%7D%7B%5BAcid%5D%7D)
Now put all the given values in this expression, we get:
![6.34=3.46+\log \frac{[\text {conjugate base}]}{[Acid]}](https://tex.z-dn.net/?f=6.34%3D3.46%2B%5Clog%20%5Cfrac%7B%5B%5Ctext%20%7Bconjugate%20base%7D%5D%7D%7B%5BAcid%5D%7D)
![\frac{[\text {conjugate base}]}{[Acid]}=758](https://tex.z-dn.net/?f=%5Cfrac%7B%5B%5Ctext%20%7Bconjugate%20base%7D%5D%7D%7B%5BAcid%5D%7D%3D758)
Therefore, the ratio of conjugate base to weak acid in the buffer system is 758: 1
