CHEMISTRY HIGH SCHOOL

Calculate the pH of an aqueous solution of 16 mL of 0.00046 M HClO4(aq) after dilution to 42 mL.

Answers

Answer 1
Answer: 1000cm^(3) of HClO_{4} [/tex] contain 0.00046mol
16cm^(3) of HClO_{4} [/tex] contain  x
                       x = (16cm ^(3) * 0.00046mol)/(1000cm x^(3) )
                       x = 0.00000736mol


M_(1) V_(1) = M_(2) V_(2)
(0.00000736mol)(16cm^(3))= (x) (42cm^(2))
         x= ((0.00000736mol) * (16cm^(3)) )/(42cm^(3) )
                  =  0.000002803mol


pH= -log [H^(+)]
    = -log (0.000002803cm^(3)
    = 5.55
                                

Related Questions

A solution is made by dissolving 10.20 grams of glucose (C6H12O6) in 355 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release 235.0 kJ of energy?
What is the formula for calcium iodine
Water vapor changing to liquid water
Which terms are used to identify pure substances?(1) an element and a mixture(2) an element and a compound(3) a solution and a mixture(4) a solution and a compound

Acid rain is caused by human activity. true or false?

Answers

Explanation:

Acid rain is caused due to increase in nitrogen oxide and sulfur oxide into the atmosphere.

The amount of these oxides increases into the atmosphere due to increase in pollution.

Therefore, pollution is caused by humans. For example, pollution from sources like vehicles, industries, factories, labs etc leads to increase in the development of harmful gases.

Thus, the statement acid rain is caused by human activity is true.
Acid rain is cause by human activity and pollution, therefore, this is true. 

Do you think that there is a high correlation between proficiency in mathematics and proficiency in chemistry? Explain why or why not. Use details about the components of each field to support your answer.

Answers

According to the fact that they both include the reaction change of elements through different processes, there should be a nice connection between them. In math, numbers pose as an element, and in chem - elements are physical things. Both of them can change due to reaction or a formula.

What needs to happen for a solute to dissolve in a particular solvent?

Answers

Answer: In order to a solute to dissolve in a solvent, both the attraction forces that bind the units of solute together and the intermolecular forces that bind the molecules of solvent together must be weaker than the attraction forces between the particles of solute and the molecules of solvent.


Explanation:


The solute particles in are binded together in virtue of attractive forces (the nature and strength of these forces depends on the particular solute).


The same happens with the solvent molecules: they are binded by attractive forces (similarly, the nature and strength of these forces depend on the particular solvent).


To get dissolved (form solution) the particles of solute must be separated and mixed with the solvent particles in a process called solvatation.


The solute particles must surrounded by the solvent particles.


When the forces of attraction between the solute particles and the solvent are stronger than the forces of attraction that bind the solute particles, the solute particles move away from the solid solute and are integrated into the solution.
the attractions between the solute and solvent molecules must be greater than the attractions keeping the solute together and the attractions keeping the solvent together.

Does the axis tilt change or stays the same is space ?

Answers

stay the same

Explanation:

Answer:

The axis is tilted in the same direction throughout a year; however, as the Earth orbits the Sun, the hemisphere (half part of earth) tilted away from the Sun will gradually come to be tilted towards the Sun, and vice versa.

Explanation:

hop this helps!!

In a reaction progress curve, which point on the curve corresponds to an intermediate of the reaction?

Answers

Answer : The valley between the two peaks is usually referred to intermediate formation of the reaction. The two mountain peaks when formed in a reaction the stable phase between them is exactly when an intermediate is formed and often observed on the curve.

The valley between two peaks

An atom that has 13 protons and 15 neutrons is an isotope of the element? How can I count it?

Answers

it's simple.
the number of protons in an atom never changes. And also, the no of protons is its atomic number.if you look up the periodic table, you will find a number on the top - left corner of each of the boxes. This is the atomic number.No 2 same elements on the periodic table have the same atomic number. So, all you have to do is search for a box that has the number 13 on it.

and by the way ... the element which you're searching for is Aluminium
Other Questions
Which of these factors are experienced by a space shuttle in orbit? Check all that apply. A. gravity B. air resistance C. friction D. inertia E. centripetal force
What unit is used to measure weighted average atomic mass?a. amub. gramc. angstromd. nanogram
How many phosphorus atoms are there in 1.75 mol of calcium phosphate,Ca3(PO4)2
Daniel claims that the product of two square roots of integers is always rational. His reasoning is given in the example below. Type either "correct" or "incorrect" next to each part of Daniel's reasoning below to indicate whether or not there is a flaw. A square root can be rational. The product of two rational numbers is always rational. The product of two integers is always a perfect square.