What should the the color of the Ph strip be if the level is 11?
91904
That depends on the type of pH stripe. They come with a color scale so you can compare the color with the standards.
568277
Yeah, it can be done with just the line.  \nFirst, locate the end point on the line.  It's exactly the midpoint of the sharp pH rise or drop.  Next, find exactly half the end point, where the moles of salt equal the moles of whatever you're adding.  At that point, pKa = pH.
541583
pH from 0 to 7: Acid solution.\nPH from 7 to 14: Basic solution.
1057594
I think this is how you do it:\nacid and base is measured in terms of pH and pOH. as you know, the H makes it acidic and the OH makes it basic, and if you mix an H and OH, you get water, which is to say it was neutralized.\nSo, let's say you have HBr with a pH of 4. You that pH is a measure of the concentration of H present in the mixture. So, to get the actual number you do -10ph, and you'll get a number like 10^-5 or something. So, to neutralize that many Hs, that's how many OH's you need. so, you'll need a pOH 4, which is the same thing is a pH of 10 (pOH = 14 - pH). \nhope that helps, good luck. and read the book, and do some of hte exercised in the book.
732528
If glucose is present the solution will change colour. The color of the final solution ranges from green to brick red depending on the amount of glucose in the solution (red is more...;)
241965
Check out the buffer recipe calculator at <http://www.bioinformatics.org/JaMBW//5/4/index.html>\n\nSome things to consider:\n\nAt what temperature do you want the pH to be 7.5? (the pKa of tris-base varies as a function of T)\n\nWhat ionic strength do you need?
215160
http://www-ec.njit.edu/~skawinsk/chem243/chap11/chap11.htm\nthis may help–near the bottom
488883
Here's one source that has a "universal indicator (pH 2-10)".  It may not be the only one:\n\nBromothymol Blue 0.08%\nMethanol (solvent)\nMethyl Red Hydrochloride 0.04%\nPhenolphthalein 0.02%\nThymol Blue  0.1%
852371
1) Basic\n2) BTB turns yellow in a base\n3) HCI + LiOH -> H2O + LiCI\n\nI think these should be right.
484813
You have to prevent the hotsauce from staining the pH paper. Run hotsauce through the filter paper; the pH of the filtrate will be about the same as the whole hotsauce.
950979
pH = - log[H+], so [H+] = 10^(-pH)\n\nfor pH = 7, [H+] = 10^(-7)
242714
Maybe the HCl concentration is too high?  Pepsin is active at pH 2.5.  Also how do you know the 'fish sample' is actually being broken down by pepsin?
271476
pH = 4.75\n\ntechnically, the pH can be anything.  But, for the most effective acetic acid buffer, the pH would be 4.75 because the pKa of acetic acid is 4.75.  When the pH = pKa, the amount of acid and base are equal, thus its resistant to pH changes is greatest.
835220
It should be close to a clear color, if you drink enough water. A light yellow color is alright but you could drink a little more water. If its dark then thats not really good. You would need to drink more water and eat healthier.
327703
The amount is diluted by a factor of 25.  So the resulting solution would have a concentration of 11.6M divided by 25 or \nor 0.464M.
936672
The pH level. 7 is neutral. Below 7 is acidic and above 7 is basic. 1 being most acidic and 14 being most basic.
117935
I believe that it is 7... If the concentration of the acid and base are equal then they would probably neutralize the solution.