What is the Relationship Between Specific Gravity and Dilution?

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Discussion Overview

The discussion revolves around the relationship between specific gravity and dilution, particularly in the context of a homework problem involving a sodium hydroxide (NaOH) solution. Participants explore how to approach the problem mathematically and conceptually.

Discussion Character

  • Homework-related, Mathematical reasoning, Conceptual clarification

Main Points Raised

  • One participant expresses uncertainty about how to proceed with a dilution problem, indicating it may be simpler than it appears.
  • Another participant suggests creating a scenario involving specific measurements of NaOH and water to formulate a mathematical expression for the required dilution.
  • A different participant emphasizes the importance of considering mass fractions rather than molalities or molarities in this context.
  • One participant indicates they need more time to think about the problem, suggesting ongoing contemplation of the concepts involved.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are differing approaches to understanding the relationship between specific gravity and dilution, and the discussion remains unresolved.

Contextual Notes

Participants have not fully defined the assumptions related to specific gravity and dilution, and there may be unresolved mathematical steps in the proposed approaches.

serendipityfox
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Homework Statement
how many grams of water to dilute 200ml noah (SG 1.32, 28.83%) to solution SG 1.157, 13.55%
Relevant Equations
sg= density x / density h20
i am nonplussed about how to proceed with this dilution, probably it is very simple.
 
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Hellp fox, :welcome: !

Work out your homework equation to turn this into a simple math problem and you'll be fine.
To do this, write a scenario, something like
200 ml NaOH of SG 1.32 weighs .. grams and consists of ... gram of H2O plus ... grams of NaOH
etc.
Then convert that into an expression in terms of symbols (not numbers) for the amount of water you need to add.
 
ok! thanks
 
Here you are dealing with mass fractions, not molalities and certainly not molarities !
 
i must think about this a little more...
 

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