ratio

  1. E

    ratio problem

    If I need a final ratio of 1 to 200 and I already have a solution of 1 to 10 then what mixture of the chemical do I need to add to the solution to get 1 to 200? So I figure this: 1 / x * 1 / 10 = 1 / 200. Solving for x I get 20. So the mixture being added to the current 1 to 10 would be 1 to...
  2. R

    Basic Molar Ratio Equation Help Needed

    Need help/explanation... given 1L of 0.5M of both NaClO and NaS2O3, what is the equation for reaction between 5mL NaClO (Sodium Hypochlorite) and 45mL Na2S2O3 (sodium thiosulfate) with depreciating mL values of 5;45, 10;40, 20;30, 30;20, 40;10, 45;5 with each other without the presence of...
  3. A

    Sulfuric Acid & Water ratio pH

    Hi All To be up front I am a complete novice working on a backyard chem project and I was hoping to get someone else's view on some results I got today. I was diluting some Adelaide, AUS tap water (8-9pH) with sulphuric acid (98%). I was shocked to see that I diluted 1part sulphuric acid to...
  4. H

    Stoichiometric Virtual Lab Help?

    Hey, I'm new here! Anyway, I'm doing a virtual chemistry lab on stoichiometric. I have completed the actual experiment; what I'm stuck on are the questions. Here is one of the questions: Below is the balanced equation for the reaction. Review the results of your...
  5. M

    Finding Moles,Molar ratio,Water loss

    Given a sample hydrate of .854g and an anhydrous salt (NiSo4) of .503g: (a) Calculate the mass of the water driven off (b) The Percent of water in the hydrate (c) The number of moles of water in the hydrate sample (d) The number of moles of the anhydrous salt (e) The molar ratio of anhydrous...
  6. R

    Limiting Nutrient Ratio Question

    My professor didn't do the best job at explaining this concept, so hopefully someone can help. I just don't understand how to approach this mathematically. The Nitrogen-Phosphorus ratio in wastewater is 9. The Nitrogen-Phosphorus ratio in algae is 27. Which is the limiting nutrient? How is...