How to find the volume of a ziploc bag

34. Calculate the molar mass of a gas pressure of 800 mm Hg; and temperature of 609C. The volume occupied by this gas is 280 ml,and it weighs 0.2 g (R = 0.0821 Loat/uoLK) Show all your calculations: (3 points) 35. A 50 ml sample of sulfuric acid HzSOs is titrated with 1.2 M sodium hydroxide NaOH. The initial burette reading is 20 ml and the final reading is 32 ml. (4 points) What is the volume of NaOH dispensed from the burette? Determine the concentration of the HzSOa solution Show all your calculations 36. A mass ofa substance (c = 5.5 Jlg: *C) was supplied with 120 J of heat energy, and its temperature changed from 20*C to 50PC. Calculate the mass of this substance: Please show all your calculations _ point) 37. 10 g of phosphoric acid are added to 10 g of sodium hydroxide in the following neutralization reaction: (4 points) HzPO4 NaOH = NazPO4 HzO (unbalanced) Determine which is the limiting reactant and which is the excess reactant: Calculate the theoretical yield (in grams) of NazPO4 38. If the heat energy Q for reacting 0.5 mole of A and 2 moles of B 100 J . What is the AH of the reaction per mole of A? point) 39. 3.5 g of NaCl is dissolved in 50 ml of water to give NaC] solution. As the NaCl dissolved, the temperature of the solution changed from 208C to 25 %C. (c =4.184 Jlg?C;, density of solution = 1.15 g/ml) (5 points) Calculate the heat energy associated with the solution of NaCl in water. Calculate AH of the NaCl as it dissolves in water: Is the reaction endothermic or exothermic? 40.A student was { trying to measure 20 ml of a solution using the pipette. However; he did not notice that has introduced air bubbles while filling the pipette. His colleague double-checked the volume and he found out that the volume dispensed was actually 18.5 ml instead of 20 ml What is the percentage error of such measurement? points)

Topic: how much baking soda and vinegar will you need to FULLY fill a ziplock bag up?  (Read 20602 times)

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mrvegas22

EXACTLY how much baking soda and vinegar will you need to FULLY fill a ziplock bag up with out popping it or under-flating it?

I am really confused. That is all our teacher told us and he said that we need to be prepared with a procedure for a lab tommorow. I know it deals with stokiometry but dont know where to go from there. We know we can find the volume of the bag by filling it with water and emptying the water into a beaker.

WHAT DO I DO NEXT? help greatly appreciated!

I know that i need to find the volume of the bag first, but all i need are some gas formulas and a procdure/instructions.

he gave us this formula...
CH3COOH + NaHCO3 --> CO2 +H2O + NaCH3COO

atomic masses:
CH3COOH - 60.05
NaHCO3 - 84.06
CO2 - 44.01
H2O - 18.02
NaCH3COO - 82.25

THANKS IN ADVANCED

« Last Edit: December 25, 2005, 01:03:28 PM by Mitch »

Why don't you just take some vinegar and baking soda and then try it at your house in a zip lock bag. From my expierences I can tell you probably a few grams (like 2-4g) of baking soda in some vinegar (like 4-8ml) should fill up a decent size bag and make stiff but not explode. If your looking for an equation to figure this out, I'm sorry but I'm no help there. Also you should try to almost fully deflate the bag.

Just play around with things. Best way to learn in my opinion.

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mrvegas22

Why don't you just take some vinegar and baking soda and then try it at your house in a zip lock bag. From my expierences I can tell you probably a few grams (like 2-4g) of baking soda in some vinegar (like 4-8ml) should fill up a decent size bag and make stiff but not explode. If your looking for an equation to figure this out, I'm sorry but I'm no help there. Also you should try to almost fully deflate the bag.

Just play around with things. Best way to learn in my opinion.

Thanks, i would but my chem teacher is expecting a full formula and work to be shown. i need the math part of it too, unfortunatly.

Chrataxe

You could always use densities.

This is a simple question.  First of all, you need to figure out the volume of the zip-loc baggie and you can do that by filling it with water and then measuring the volume of water you used.  Now that you know the volume of the bag, you will know how much gas is needed to fill up the bag.  In the reaction given to you, you can see that the reaction between acetic acid (vinegar) and sodium bicarbonate (baking soda) will result in the release of CO2 gas.

With the volume known, you can use the ideal gas law (PV=nRT) to calculate the number of moles of CO2 gas you will need to obtain that volume.  When you calculate the moles you can calculate the mass of sodium bicarbonate needed.  This will tell you how much baking soda is needed.  You should then be able to figure out the rest yourself.  

"A real fart is beefy, has a density greater than or equal to the air surrounding it, consists

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