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How many grams of concentrated nitric acid solution should be used to prepare 250mL of 2.0M HNO3 ?The concentrated acid is 70% HNO3.
Verified Answer
How many grams of concentrated nitric acid solution should be used to ...
The required number of moles=( 250/1000)x2
=0.5 moles
(no. of moles=molarity x volume)
so,required mass of HNO3=0.5x63
=31.5 grams
(given mass=no. of moles x molar mass)
Given, 
70 grams of HNO3 are present in 100 grams of the solution
so,1 gram will be present in 100/70 grams of solution
hence 31.5 grams will be present in (100/70)x31.5 grams of solution.
so amount of concentrated nitric acid solution used is 45 grams.

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Most Upvoted Answer
How many grams of concentrated nitric acid solution should be used to ...
Calculating the amount of concentrated nitric acid solution needed:
- Given:
- Target concentration of HNO3: 2.0 M
- Volume needed: 250 mL
- Concentrated acid concentration: 70%
- Formula to calculate the amount of concentrated acid needed:
- C1V1 = C2V2
- Where:
- C1 = Concentration of concentrated acid (unknown)
- V1 = Volume of concentrated acid (unknown)
- C2 = Target concentration of HNO3 (2.0 M)
- V2 = Volume needed (250 mL)
- Let's solve for C1:
- 0.70 * V1 = 2.0 M * 250 mL
- V1 = (2.0 M * 250 mL) / 0.70
- V1 = 714.29 mL
- Therefore, you would need 714.29 mL of the 70% concentrated nitric acid solution to prepare 250 mL of 2.0 M HNO3.

Converting mL to grams:
- To convert the volume (mL) to grams, you would need to use the density of the concentrated nitric acid solution.
- The density of concentrated nitric acid is approximately 1.41 g/mL.
- Therefore, to calculate the mass of the concentrated acid needed:
- Mass = Volume * Density
- Mass = 714.29 mL * 1.41 g/mL
- Mass ≈ 1007.14 grams
- Hence, you would need approximately 1007.14 grams of the 70% concentrated nitric acid solution to prepare 250 mL of 2.0 M HNO3.
Community Answer
How many grams of concentrated nitric acid solution should be used to ...
70 gram
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How many grams of concentrated nitric acid solution should be used to prepare 250mL of 2.0M HNO3 ?The concentrated acid is 70% HNO3.
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