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Our pool alkalinity level is at least 240 (per the test strip) and it stays there no matter what I do. I've added about 8 lbs of reducer over time, to lower alkalinity, it doesn't touch it. However, pH still stays at 7.4-7.8. I can add a bag of shock ...
Started by lsheridan on
, 6 posts
by 4 people.
Answer Snippets (Read the full thread at havuz):
Also, one shouldFollow the procedure in this post which is a combination of acid addition with aeration at low pH, to lower alkalinity, ....
The pH rise faster and should keep the overall pH low until the TA target is reached.
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I'm trying to buffer and neutralize a very acidic solution by adding the acidic solution into a buffer. However, using 1 M PO4 buffer is not strong enough and requires an enormous volume. Calculating 10 M sodium phosphate buffer requires crazy amounts...
Started by justcurious on
, 6 posts
by 4 people.
Answer Snippets (Read the full thread at chemicalforums):
What I have been doing is calculating....
Too high of a pH and it is too soluble in water; too low and it precipitates out and is difficult to get back in.
I can extract it into organic solvents but I need a pH between 7-8 for maximal extractability.
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I am new to waste water treatment. I own a small herbal extract manufacturing unit. We need to treat 15000 L of botanical aqueous extract every day. I tried the following expt
waste water (light green) > pH adjustment with NaOH to 9-10 > the color...
Started by navin on
, 24 posts
by 7 people.
Answer Snippets (Read the full thread at waterandwastewater):
Will check the in and out....
Quite unusual as I always thought celite is very inert .
Two issues - one could be tannins - which NaOH won't bleach and would require at leat UF to remove some change in pH thereby having an influene on the color.
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Ask your Facebook Friends
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DMT Extraction Got a couple of questions for the Chemist folk out there.
Just a quick note on how swim extracts his stuff...
1. Soke powdered bark in Hydrocloric Acid of Ph 1.3
2. Filter out into a bowl
3. Bring solution up to ph 11.8 with Sodium Hydroxide...
Started by TheDr007 on
, 11 posts
by 5 people.
Answer Snippets (Read the full thread at opiophile):
Allah just appeared to me in a vision and told me to suggest you do some reading on ... .
I'm not even gonna go into plugging when you're confused about PH and chemicals like NAOH and HCL, both of these can be very dangerous.
Too long to me.
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Afer cracking an ampuole i decant it into a 15/10ml tube, date it and store it in the fridge. After two weeks i throw it out. Cheers Cam From: Confocal Microscopy List on behalf of David Knecht Sent: Fri 24/04/2009 10:50 PM To: CONFOCALMICROSCOPY@LISTS...
Started by Cameron Nowell < on
, 1 posts
by 1 people.
Answer Snippets (Read the full thread at umn):
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Quote: : I suppose you could argue in terms of where UV starts and how much attenuation is required before you consider it attenuated so I think its best to just look at some data. http://www.pbase.com/image/143089605 shows the absorption of a glass microscope...
Started by Warthaug on
, 2 posts
by 2 people.
Answer Snippets (Read the full thread at homebrewtalk):
Thus and beta acids are extracted....
Want to ionize the acids by raising the pH in order to keep them in solution.
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2012 Grade Profiles for University Admission NUS http://www.nus.edu.sg/oam/gradeprofile/sprogramme-igp.html NTU http://www3.ntu.edu.sg/oad2/website_files/IGP/AY11-12_IGP.pdf SMU http://www.smu.edu.sg/admissions/docs/GradeProfile.pdf NIE http://www.nie...
Started by UltimaOnline on
, 25 posts
by 1 people.
Answer Snippets (Read the full thread at sgforums):
Determine the formula of the hydrocarbon+] = 1.7932 x 10^-6 pH = 5.746 = 5.75 (3 sf) Note that Le Chatelier's principle predicts that at acidic pH, the position of equilibrium shifts ....
All volumes measured at 20 deg C.
To aq NaOH.
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Chemistry MCQs intermidate XI Karachi Board MCQs
friendsmania.net
Five Year Papers
1. The process in which a solid directly changes to vapours without melting is called .
(Evaporation, Condensation, Sublimation)
2. The oxidation number of P in PO3-4 is...
Started by Tanha Karim on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at friendsmania):
Plz reply good job Nicest Work Keep it up and thank.
Mjhe ye print karna hai....how can i do it....
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Since most of us taking the AP chem are going to try this test out, lets start a discussion on the problems here!
Can someone explain the answer to #12 and #65? I didnt understand those two...
Started by LaCielle on
, 13 posts
by 6 people.
Answer Snippets (Read the full thread at collegeconfidential):
I would say B ....
NH3 and HC2H3O2
Also, could anyone explain to me what obviously lower the pH.
NaOH and NH3
E.
HCl and NaCl
D.
H3PO4 and NaH2PO4
C.
NH3 and NH4Cl
B.
Exam online, #12 is the following:
12) A buffer at a pH < 6.
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Hello....I have been asked to obtain information for a client.
Client is currently using flocculation/sedimentation to reduce their Chrome 6 to Chrome 3....the wastewater from this process is not acceptable by local authorities to dump into the community...
Started by Terry_Murphy on
, 25 posts
by 18 people.
Answer Snippets (Read the full thread at waterandwastewater):
Be well precipitated at pH 8-9 with NaOH, MgO or Lime and is then dewatered in a filterpress, ORP=785mV)
- Use NaHSO3 and H2SO4 to keep condition of pH=2.5 and ORP=250mV (actual result: pH=2.17 and ORP=241mV)
- Use ....
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