Science Homework Help

Bie What isOH – – log ItL sample of HCI is placed in a flask with a few drops of phenolphthalein indicator. IfPH – – log (PH – 1.6it takes 36.3 ml of a 0.235M NaOH solution to reach the endpoint, what is the concentrationof the HCI solution?To calculate theHCL +NaOHO8.53 x 10-3 M34. OML34.3 MLO0.235 M2 MExample: What isO0.251 M36.3 ml NaOH x IL x 0.235M NaOHIL NaOH* Jmod HCI[H30′] = 101000mLimol NaOH[H30*] = 10O0. 158 M34.3/ 1000 = 0368 x 0.235=0085305 – molarity, 0085305[H30*] – 3.2=modell = 10343 -Example: What is th4. What is the concentration of OH- ions in a solution that contains 3.5 x 10-4 M H20* ions? (O. 2506Kw = [H30*] x1.0 x 10-14M[H30′] = 3.1258.9 x 10-6 MPH = – 108 [H30PH = – log (3.123.5 x 10-4 MPH = 3.518.9 x 10-3 Mction 10.7: Re2.9 X 10-11 Macid + base > water+ salt5. What are the products of this neutralization reaction: HCI + NaOH -?rst two parts of thand Hydrodroxidd Hydroxides:is and bases rNaCl + H20O NaH + CIOHO NaOH + HCItions of hyO No reaction’rite the f6. What is the purpose of a buffer?e two substances