acetylsalicylic acid (aspirin), hc9h7o4, is the mo
acetylsalicylic acid (aspirin), hc9h7o4, is the most widely used pain reliever and fever reducer. find the ph of 0.030 m aqueous aspirin at body temperature (ka at 37 degrees c = 3.6x10^-4.)
we’re being asked to calculate the ph of 0.03m hc9h7o4.remember that weak acids partially dissociate in water and that acids donate h+ to the base (water in this case). the dissociation of hc9h7o4 is as follows:hc9h7o4 (aq) + h2o(l) ⇌ h3o+(aq) + c9h7o4– (aq)from this, we can construct an ice table. remember that liquids are ignored in the ice table and ka expression.the ka expression for hc9h7o4  is:ka=productsreactants=[h3o+][a-][hc9h7o4]note that each concentration is raised by the stoichiometric coefficient: [hc9h7o4], [h3o+] and [c9h7o4–] are raised to 1.plugin the value of ka and the terms from the ice chart: ka=[h3o+][a-][hc9h7o4]3.6 × 10-4=[x][x][0.03 -x]check if x is negligible in the denominator: if hc9h7o4ka>500 then x is negligible in the denominatorhc9h7o4ka= 0.03 3.6 ×10-4 = 83.3 < 500since the ratio is less than 500, we can’t remove (–x) from the equation. we first need to manipulate the equation to get a quadratic equation:3.6×10-4 = xx0.03-x0.03-x3.6×10-4   =x21.08 ×10-5-3.6×10-4 x = x2x2 +1.08 ×10-5-3.6×10-4 x =0we will then use the quadratic formula to solve for x. the quadratic formula is:x = -b±b2-4ac2afrom the equation, we have a = 1, b = 1.08×10–5, and c = –3.6 × 10–4. solving for x, the equilibrium concentration of [h3o+] and [c9h7o4–]:x = -b±b2-4ac2ax = -1.08×10-3±1.08×10-32-41-3.6 ×10-421x = -1.08×10-3±0.037962the calculation then splits into two ways:x = -1.08x10-3+0.037962x = 0.01844                          x = -1.08x10-3-0.037962x = -0.03904we take the positive value of x since the concentration of h3o+ and a– must increase. this means [h3o+] = [a–] = x = 0.01844 mnow calculate the ph using the formula below:ph = -log[h3o+]ph = -log[0.01844]ph = 1.73the ph of 0.030 m of aspirin is 1.73.
pain relievers like ibuprofen and aspirin belong to a class of drugs called nonsteroidal anti-inflammatory drugs (nsaids). nsaids target enzymes that help with the formation of pro-inflammatory compounds, alleviating the symptoms of the initial stage of inflammation. it is best to see doc for proper evaluation and treatment. there are otc med and rx med but work differently for different pts. one may respond better to you may not respond good with other pts.doctor can help you to find the causes of your chronic acidity such as stress, diet etc.. see more... antiseptics are used to sterilise surfaces of living tissue when the risk of infection is very high, such as during surgery or on wounds. commonly used antiseptics include inorganics like iodine and boric acid or organics like iodoform and some phenolic compounds. e.g. tincture of iodine (2-3% solution of iodine in an alcohol-water mixture) and iodoform serve as powerful antiseptics and is used to apply on wounds. a dilute aqueous solution of boric acid is a weak antiseptic used for eyes. various phenols are used as antiseptics. a dilute aqueous solution of phenol (carbolic acid) is used as antiseptic; however, phenol is found to be corrosive in nature. many chloro derivatives of phenols are more potent antiseptics than the phenol itself. they can be used with much lower concentrations, which reduce their corrosive effects. two of the most common phenol derivatives in use are trichlorophenol (tcp) and chloroxylenol (which is an active ingredient of antiseptic dettol). thymol obtained from oil of thyme (a spice plant) has excellent non-toxic antiseptic properties. use the ka equation: 
take the acid as ha
this will dissociate : 
ha ↔ h+ + a- 
ka = [h+] [a-] /[ha] 
because dissociation is very small we can use 0.1m for [ha] 
[h+] = 2/50*0.1 = 0.0004m 
[a-] = 0.0004m 
 ka 0.0004 * 0.0004 / 0.1 
ka = 1.6*10^-5 * 0.1 
ka = 1.6*10^-4 everyone responds differently so its hard to tell. its really a trial and error thing to find the opioid that works best for you at the moment. see more... these are some of the safest drugs but not totally devoid of side effects. have you ever consent an allergist about your condition? see more... * the strongest antibiotic is probably vancomycin. the highest division of an antibiotic is between a bactericidal antibiotic and a bacteriostatic antibiotic. baclofen, a gaba agonist, is often prescribed for chronic muscle pain disorders that have been refractory to other medications. baclofen should be slowly titrated to a range of 30-80 mg/day and should never be abruptly discontinued. side effects may include nausea, confusion, drowsiness and weakness, especially in older patients. do not self-medicate, always ask your physician first. see more... haai<br><br>die link onder wys al die benefits. <br><br>http://www.your-natural-cures.com/health-benefits.html<br><br>dink gerus aan omega 3 te neem internally - dit help baie goed om te help vir inflammasie. <br><br>groete<br><br>dr debbie<br>www.drdebbie.co.za<br> the name you are mentioning is the generic name of this medication. the brand names are temovate, (clobetasol) olux, clobex et al. see more...