Discussion Overview
The discussion revolves around calculating the molarity of concentrated nitric acid, which is specified as 70.7% HNO3 by mass. Participants explore the relationship between mass, volume, and moles, while addressing the density of the solution and the implications for molarity. The context includes a homework problem requiring the application of chemical principles.
Discussion Character
- Homework-related
- Mathematical reasoning
- Technical explanation
Main Points Raised
- One participant presents a homework problem involving the calculation of molarity for concentrated nitric acid, providing the mass percentages and density of the solution.
- Another participant suggests using specific mass amounts (70.7g of HNO3 and 29.3g of H2O) to simplify calculations.
- A participant calculates the number of moles of HNO3 and H2O based on the provided mass percentages but questions the relevance of multiplying by 2.
- There is a clarification regarding the density unit, with one participant confirming it as g/cm³.
- A participant incorrectly suggests multiplying the mass of HNO3 by the number of moles to find mass, which is corrected by another participant who emphasizes using the total mass of the solution to find volume.
- One participant successfully calculates the volume of the solution using the density and total mass, leading to a molarity calculation.
- Another participant encourages the original poster to check the units used in their calculations, particularly for volume and molarity.
Areas of Agreement / Disagreement
Participants generally agree on the approach to calculating molarity, but there are moments of confusion regarding the application of formulas and units, indicating that the discussion is not fully resolved.
Contextual Notes
Participants express uncertainty about the correct application of formulas and the significance of units in calculations, which may affect the final results.
Who May Find This Useful
This discussion may be useful for students working on chemistry problems involving molarity, density, and mass percentages, particularly in the context of solutions and concentrations.