Hi I am working on my chemistry homework about acids and bases and I am confused on this question from a lab. We used grape juice and cranberry juice and we had to put HCl and NaOH in the test tube full of juice.
1. Referring back to procedure 1 of the experiment, which of the two juices is more useful as a general pH indicator and why? I think it is grape juice but I just don't know what to back my answer with. I appreciate the help!
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Imagine that you are in chemistry lab and need to make 1.00L of a solution with a pH of 2.40.
You have in front of you
100 mL of 6.00
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1) If 22.0 mL of 2.3 M C2H5NH2 are titrated with 0.9 M HCl, what is the pH at 13.1 mL?
2) If 25.1 mL of 2.2 M CH3COOH are titrated with 0.9 M NaOH, what is the pH at 14.9 mL?
3) Exactly 47.0 mL of 0.2 M HNO2 are titrated with a 0.2 M NaOH solution. What is the pH at the equivalence point ?
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Say you are provided two samples containing an unknown concentration of calcium. One sample is a liquid and one sample is a solid (ie. calcium tablet). What analytical technique would be most efficient for chemical analysis and why? Take into consideration LOD, convenience, precision, accuracy, etc.
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Gold is plated from a solution of Au3+ using a constant current of 4.86 A for 352 minutes.Calculate the grams of gold plated out of solution.
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7. Chemical reactions are reversible, however enzymes can catalyze a reaction reversibly or irreversibly. Document each of these characteristics through graphic examples
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A toluene solution is blended with 25% mass of benzene. The vapor pressure of benzene and toluene at 25'C are 94.2 torr and 28.4 torr respectively. (a) Calculate the vapor pressure of each component, (b) total pressure of the above solution, and (c) the composition of the vapor in mass percent.
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32. Calculate the [H+]of the ammonium hydroxide solution from a pH of 10.63.
mol/L= ?
33. Display the ICE table used to calculate your experimental Kb for ammonium hydroxide based on your values.
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Natural gas consists of 60.0 mole% ethane and 40.0 mole% butane. The gas is stored in a 300 ft^3 tank at a pressure of 1500 psig, and a temperature of 220 F and sold at a cost of $0.15/lb.
a) Determine whether the ideal gas equation of state is a good approximation for the given conditions.
b) Estimate the cost to fill the tank using the compressibility-factor equation of state.
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compare the hardness of some metals with polymers
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1) Compare the solubility in water of similar size compounds like pentane, 1-propanol, and propanone. Which functional group(s) allow the compound to be soluble in water: alcohols, alkanes, and/or ketones? What do the functional groups of the more soluble compounds have in common? (What IMFs do they have with water that the insoluble function group doesn’t have)
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Propose a reason for why 2,4-DNP or semicarbazone derivatives usually precipitate out of their ethanolic solutions.
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At 1 bar, how much energy is required to heat 37.0 g of H2O(s) at −18.0 ∘C to H2O(g) at 119.0 ∘C?
q=
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If a solution containing 39.142 g39.142 g of mercury(II) nitrate is allowed to react completely with a solution containing 10.872 g10.872 g of sodium dichromate, how many grams of solid precipitate will form?
precipitate:
How many grams of the reactant in excess will remain after the reaction?
excess reactant:
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