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23 Nov 2019

Okay, I know how to balance an equation once it is set up for metodo the calculations, but how do you GET the initial set up? Icannot figure this out. If you were asked :

"When NaOH mixes with HCl, what is the balanced equation?"Howdo you find out the part in the red to begin with..I can balanceitif I had the red part, but I can't find the part in the red.I'msure it has something to do with the periodic table, but Ijustcan't grasp it. How do you know to put Na with Cl and Hwith2O's?

NaOH + HCI = NaCl +H2O

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Patrina SchowalterLv2

15 Mar 2019

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The titration of the 5.00mL aliquot using the sodium hydroxide solution determines the total acid content. However, remember that you used .10M HCl to more quickly establish the hydrolysis equilibrium. The titration with the sodium hydroxide determines the total acid content of the aliquot,

NaOH + HCl -> H2O + Na + Cl
NaOH + CH3COOH -> H2O + Na + CH3COO

and so to determine the number of moles of acetic acid present in this aliquot, you have to first subtract out the amount of sodium hydroxide that reacts with the HCl.

I know that Total mols = mols of HCl added at the beginning + mols of acetic acid produced

I am assuming that the mols of HCl added at the begining is 0.005 mols because (0.05 L) x (0.10 M)

We added 50.0 mL of 0.1 M HCl and 3.00 mL of neat methyl acetate and let it set for a couple of days.

I then transfered 5.00 mL of the acid aliqout into a beaker.

We then titrated and used 18.5 mL of 0.2 NaOH to neutralize 5.00 mL of the acid aliquot.

Can someone help me find the total mols of acid in the aliquot? (I tried solving it and i got 0.004 mols but I think its wrong)

1. Determine the amount of solute in the following samples:

500 ml of 0.2 M KI (potassium iodide)

220 ml of 0.03 M H2SO4 (sulfuric acid)

2.5 l of 0.1 M MgNO3 (magnesium nitrate)

1 ml of 5 M HCl (hydrochloric acid)

This problem requires that you know what molarity (M) is. M (molarity) = # of moles of solutes / Liter of solution. You are given the volume. You should be able to obtain moles of solutes. Your answers can be in moles or grams (either one will be acceptable).

2. How many ml of 0.1 M HCl would be required to titrate 35 ml of 1 M NaOH to the end point?

This is an acid/base reaction.

1) First, write out the balanced chemical reaction for HCl + NaOH.

2) Second, figure out the number of moles of NaOH in 35 ml of 1 M NaOH.

3) How many moles of HCl is required for completely reacting with the moles of NaOH in Part 2).

3. What is the pH of a 0.03 M solution of the strong base NaOH?

1) This question requires that you know pH = - log [H₃O⁺], or simply as pH = - log [H⁺] (to make it easier).

2)So, you have to know how to use your scientific calculator to do log function (check Youtube).

3) This question also requires that you know: pOH = - log [OH^-].

4) This question also requires that you know: [H₃O⁺][OH^-] = 1.0 x 10^-14 or pH + pOH = 14

5) First step, determine the concentration of OH^- in 0.03M NaOH when it dissociates or breaks up into Na⁺ and OH^-.

6) This will give you [OH^-]. You can plug this into pOH = - log [OH^-] to get pOH.

7) Once you get pOH, then use (pH + pOH = 14) to get pH.

4. Balance the chemical reactions shown below and then write equilibrium expressions for each. All reactants and all products are in the gas phase.

CO + F₂ ------> COF₂

CH₄ + O₂ ------> CO₂ + H₂O

N₂O₄ -----> Br₂ + NO

BrNO -----> Br₂ + NO

1)This problem requires that you know how to balance chemical equations.

2)After you balance the equation, you need to know the equilibrium expression

5. Determine the oxidation states of each element comprising the following ionic compounds:

KClO₄

NaMnO₄

Sr(NO₃)₂

NaHCO₃

CH₄

I'm working on a project I need some help with (BTW I asked my teacher and I am allowed to ask for help). If there was anything I wasn't clear on please tell me because I'm just hopelessly lost on this. Also just to note this actually has a fair bit of chemistry in it but because it's all related to electricity and there is no chemistal engineering subject Tab I put it here.

Okay so in this project we have a hypothetical scenario. In this scenario I'm on an abandoned island and I need to power a satellite for 97 minutes at 12 volts at 30 amps and 5 volts at 45 amps. But on this island are various supplies including a 1987 V8 engine which I think will provide 12 volts at 30 amps. Now what I need is fuel to get it going. I have 4 deep friers full of oil, 3 cases of magnum bottles of champagne, salt water from the ocean, 21 2 gallon jars of pickled eggs, and 33-5 gallon containers of italian salad dressing, and 23 #10 cans of tomato sauce. There is also an abandoned moonshine still. So using the oil from the friers, the champagne, and getting the oil out of the salad dressing I should be able to get a decent amount of biofuel correct? I also have 9 full 20# propane tanks and I read that propane can be used to make fuel burn more efficiently by taking the place of the air injection. If there anything else from this list that I could make into fuel of some kind? What about Moonshine everything I read mentions sugar and yeast which I don't think I have either of.

So assuming I have that all worked out okay that gets me my 12 volts at 30 amps. But I still need the 5 volts at 45 amps. And one solution I was thinking of was making voltic cells. Amoung the materials I have to work with that are of use here are some 1/2'' and 3/4'' copper pipes, 8 roles of aluminum foil, 23 20ft lengths of 6 in. sch. 40 PVC pipe, 17 20ft lengths of 4in. sch. 40 PVC pipe, and 9 20ft lengths of 2 in. Sch. 40 PVC pipe. I also have some cans of cold galvanizing spray paint ( meaning I have zinc), and various containers including a lot of PVC pipe, 55 gallon plastic drums, and a complete set of commercial pots and pans. I also have various wires but I'll put that asside for now. I also have access to some PH adjust (down)

Now what I want to do is make a battery set up that can deliver 5 volts at 45 amps for 97 minutes.

I know I can make several battery cells and connect them in series and parallel to get the desires voltage and current. But i'm having trouble figuring out what my voltage and amperage would be for each cell. Also how long would the charge last?

I read something called aluminum-air batteries but I'm not clear on how they are made or if they are ideal for what I need. Would using the pickling solution from the pickled eggs as my electrolyte be better than using the salt water? Or should I separate the vinegar out of the salad dressing and us that? Would using the PH adjust (down) help?

I tried looking up some reduction charts but those were all in aqueous. What I was able to get was that for copper and aluminum it was about 2 v potential and for copper Zinc it was about 1.01 v. Is this correct? For a base line lets say I just use the PVC pips, copper pipe, aluminum foil, Salt water, and for wiring I use copper wire. if I"m correct and I get about 2 V from each battery how do I find my amperage? What part of all this affects the current and how would I calculate it? Would using a different kind of wire be better? I have access to a couple different kinds.

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