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4 years ago

How many ml of 50 percent acid should be added to pure acid to make 70ml of 65 percent acid?

Chemistry

2 answers:

Oxana [17]4 years ago

8 0

Answer

Explanation:

thank u next thats the answer

alexandr1967 [171]4 years ago

6 0

Answer:

91 mL

Explanation:

In chemistry, to solve this kind of exercises, dilutions, and concentrations is common to use the following equation

C1*V1=C2*V2

In which V1 refers to volume 1, in this case, is 70mL because is the quantity I have, the solution I can use to obtain another solution. C1 refers to the concentration of the solution I also have, in this case, 65%.

C2 and V2 refer to the volume and concentration of the solution I am looking for. So, if want to know V2, which is the volume I need to add, the only thing to do is find V2 in the equation:

V2=C1*V1/C2

V2= 65%*70mL/50%

V2= 91mL

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3 years ago

Suppose 110.0 mL110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen

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Suppose 110.0 mL of hydrogen gas at STP combines with a stoichiometric amount of fluorine gas and the resulting hydrogen fluoride dissolves in water to form 150.0 mL of an aqueous solution. 0.032 M is the concentration of the resulting hydrofluoric acid.

<h3>What is Balanced Chemical Equation ?</h3>

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now write the balanced chemical equation

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<h3>What is Ideal Gas ?</h3>

An ideal gas is a gas that obey gas laws at all temperature and pressure conditions. It have velocity and mass but do not have volume. Ideal gas is also called perfect gas. Ideal gas is a hypothetical gas.

It is expressed as:

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Here,

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Now put the values in above expression

PV = nRT

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To calculate the concentration of resulting solution use the expression

$C = \frac{n}{V}$

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2 years ago

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Answer:

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