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1) Aluminum Chloride- Red- PH: 4.0 2) Sodium Carbonate - Violet- PH: 9.5 Ammonium Acetate - Yellow - PH: 6.5 the question is: explanation with equation to show hydrolysis Could you please help me thank you.

13 years ago

acetic acid: 0.1 M 30ml hydrochloric acid 0.1 M 5 ml sodium hydroxide 0.1 M 15 ml Buffer + 5ml of: 1.91 ph ph (measured): 4:52 ph HOW DO I CALCULATE PH(CALCULATED)? AND ALSO IT SAYS SHOW YOUR CALCULATION FOR THE PH OF THE BUFFER BEFIRE AND AFTER THE ADDIT...

13 years ago

How do I calculate the initial concentraion of an acid?

13 years ago

Okay let me write it this way. I mixed 30 mL of 0.1 M Acetic Acid and 15 mL of 0.1 M Sodium Hydroxide and measured the pH. Then I added 5 mL of 0.1 M NaOH to this buffer and measured the pH. It's asking me: Show the calculations for the pH of the buffer b...

13 years ago

Run # Volume NaOH used (mL) 1 4.1 2 4.3 3 2.8 Concentraion of NaOH: 0.113 M pH of acid: 2.84 the questions are: #moles of NaOH: ? initial acid concentration: ? Determine the Ka and pka of the weak acid: ? So here is what I did: Shaked for several minutes...

13 years ago

[NaOH]= 0.113M V of NaOH needed to titrate = 0.0037L V of unknown weak organic acid = 0.025L Find: The initial concentration of this weak acid.

13 years ago

How do you calculate the theoretical cell voltage? 1) Zn|Zn^+2 | Cu|Cu^+2 2) Cu|Cu^+2 | Zn|Zn^+2 3) Fe|Fe^+2 | Cu|Cu^+2 4) Zn|Zn^+2 | Cu|Cu^+2 5) Cu|Cu^+2 | Cu|Cu^+2

13 years ago

How do you calculate the theoretical cell voltage? 1) Zn|Zn^+2 (1M)| Cu|Cu^+2 (1M) 2) Cu|Cu^+2 (1M)| Zn|Zn^+2 (1M) 3) Fe|Fe^+2 (1M)| Cu|Cu^+2 (1M) 4) Zn|Zn^+2 (1M)| Cu|Cu^+2 (0.1M) 5) Cu|Cu^+2 (1M)| Cu|Cu^+2 (0.1 M) Now 4 and 5 have different moles how do...

13 years ago

How do you calculate the theoretical cell voltage? 1) Zn|Zn^+2 (1M)| Cu|Cu^+2 (1M) okay so by looking at example this example Calculate the emf (voltage) for the following reaction: Zn(s) + Fe2+ → Zn2+ + Fe(s) Write the 2 half reactions: Zn(s) → Zn2+ + 2e...

13 years ago

Please...how do you calculate the reduction potential for 1 M CuSO4? I've been trying for hours......!!

13 years ago

Calculate the reduction potential of the following solutions: a- 1 M CuSO4 b- 1 M FeSO4 c- 0.1 M CuSO4 I'm now the same answer as you. :( This is how I did it can you please check. a- Cu(s)---> Cu(aq) + 2e = -0.34 V SO4^-2(aq) + 4H(aq) + 2e --> H2SO3(aq)...

13 years ago

the measured cell voltages are supposed to be smaller than the theoretical cell voltages, but when I'm calculating the theoretical cell voltages they are smaller. And I don't know why I'm getting these. Can you please check if I'm doing it right. Thank yo...

13 years ago

I'm adding this to my previous question..in our textbook its says Ecell=Ecathode-Eanode. That's my values were smaller. But you added them. Will that make a difference? Should I do it the way you did it? Because they have to be bigger numbers? Thank you.

13 years ago

I have a question. For Fe|Fe^+2 (1M)| Cu|Cu^+2 (1M why did you use Fe^2+ ==> Fe^3+ + e Eo = -0.771 ? instead of: Fe ---> Fe^+2 + 2e ? thank you..

13 years ago

if it doesnt exist should I write NH3 + H2O ---> NH4OH + HA ? thank you.

13 years ago

Okay let me write it this way. I mixed 30 mL of 0.1 M Acetic Acid and 15 mL of 0.1 M Sodium Hydroxide and measured the pH. Then I added 5 mL of 0.1 M NaOH to this buffer and measured the pH. It's asking me: Show the calculations for the pH of the buffer b...

13 years ago

Ok. Thank you so much Dr. Bob

13 years ago

I how you answers this but what is "c" HAc? NaAc?

13 years ago

Ok How do I find the initial concentration of the acid?

13 years ago

but for example for question 4 Zn is 1 M and Cu is 0.1 M will that make a difference? and can you just do one example I want to see if I'm on the right track. Thanks.

13 years ago

NOTE I calculates by using the above example

13 years ago

******HOW DO YOU CALCULATE THE REDUCTION POTENTIAL OF 1 M CuSO4 AND 0.1 M CuSO4? NOTE: THE REDUCTION POTENTIAL OF 1M Zn(NO3)2 IS -0.76 V. I'M REALLY STUCK.

13 years ago

Please help me I've been trying for the whole day!

13 years ago

Thank you very much..And I posted another question, the most important ones that I don't know how to do.

13 years ago

the cell is written like that in the report sheet so that's why I wrote it like that

13 years ago