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Evgesh-ka [11]
3 years ago
12

A 0.100 L sample of an unknown HNO3 solution required 51.3 mL of 0.250 M Ba(OH)2 for complete neutralization. What is the concen

tration of the HNO3 solution
Chemistry
1 answer:
luda_lava [24]3 years ago
6 0

Answer:

0.257M HNO3

Explanation:

The reaction of HNO3 with Ba(OH)2 is:

2 HNO₃ + Ba(OH)₂ → 2 H₂O + Ba(NO₃)₂

That means 2 moles of HNO3 reacts with 1 mole of Ba(OH)2.

51,3mL of 0.250M Ba(OH)2 are:

0.0513L ₓ (0.250mol / L) = 0.0128moles

Moles of HNO3 are:

0.0128moles Ba(OH)2 ₓ (2 mol HNO3 / 1 mol Ba(OH)2) = 0.0257mol HNO3

As these moles are in 0.100L:

0.0257mol HNO3 / 0.100L = <em>0.257M HNO3</em>

<em />

I hope it helps!

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Answer:

We know that,

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A switch

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Vanillin (used to flavour vanilla ice cream and other foods) is the substance whose aroma the human nose detects in the smallest
Rudiy27

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The cost is $0.063.

Explanation:

First, we need to express the volume of the hangar in liters. We know that 1 ft³ = 28.31 L, so using proportions:

5.0 \times 10^{7} ft^{3} .\frac{28.31L}{1ft^{3} } =1.4 \times 10^{9} L

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6 0
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Which of the following is not a organic compound, a -corn oil b -b r o m i n e c -m e t h a n e d- protein
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Analysis of the water content of a lake found in the desert showed that it contained 17.5 percent chloride ion, and has a densit
tankabanditka [31]

Answer:

The molarity is 6.0 M.

Explanation:

<em>The </em><em>concentration</em><em> of a solution is the amount of solute present in a given amount  of solvent, or a given amount of solution.</em>

In this problem, we are asked to convert percent by mass to molarity, which are two different concentration units.

<em>The </em><em>percent by mass </em><em>is the ratio of the mass of a solute to the mass of the solution, multiplied by 100 percent.</em> On the other hand, <em>molarity (M)</em><em> is defined as the number of moles of solute per liter of solution.</em>

If we have 17.15 percent chloride ion, that means that we have 17.15 grams of chloride ion in 100 grams of solution. The density provided is the density of the solution, so we calculate how many mL correspond to 100 grams of solution:

1.23 g ----------- 1 mL

100 g ------------ <u>x= 81.3 mL</u>

Therefore, 17.5 grams of chloride ion are contained in 81.3 mL. Now we need to convert these grams into moles.

The atomic mass of chlorine is 35.5 g/mol:

35.5 g --------------- 1 mol

17.5 g --------------- <u>x= 0. 49 mol</u>

This 0.49 moles are contained in 81.13 mL, the definition of molarity says that this moles are contained in a liter (or what is the same, 1000 mL):

81.3 mL --------------- 0.49 mol

1000 mL ------------- x= 6.0 M

The molarity of the chloride ion will be 6.0 M.

5 0
3 years ago
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