# ANAL 425: Titrating Hydrochloric Acid Solution with a Standard Sodium Hydroxide Solution ANAL 42: The Hydrochlork…

ANAL 425: Titrating Hydrochloric Acid Solution with a
Standard Sodium Hydroxide Solution

ANAL 42: The Hydrochlork Acil Solution with Standard Sodium Hydroxide Solution (3) Calculate the number of equivalents of acid in 1.00 lb of dry acid powder. The molar mass of NaHSO, is 120.07 g mol (4) Calculate the mass, in pounds, of dry acid powder required to supply the equivalent amount of acid present in 1 qt (0.9463 L) of the commercial muri- atic acid solution discussed in Question 1. ANAL 42. Tharing Hydrochloric Acid solution with a Standard Sodium Hydroxide Solution Post-Laboratory Questions (Use the spaces provided for the answers and additional paper if necessary error in measurement could throw off the titration of the acid, 10mL 1. A chemistry student purchased commercially pre (4) Briefly comment on the procedural problem pared muriatic acid for use in cleaning a home swim associated with the titration described in (3). ming pool. Realizing that muriatic acid is another with such a large difference name for HCl solution, the student wanted to deter- mine the HCl concentration in the purchased solution. involumes required, the slighted The student took a 10.00-ml solution sample and added it to enough distilled water to make a 250-ml solution. A 10.00-ml sample of the diluted muriatic acid solution required 41.17 mL of 0.1232 N NaOH SO- lution for titration to a phenolphthalein end point. (1) Calculate the normality of the diluted muriatic acid solution. -AS1 10mL muriaticagd NM” 2. A pool-supply store owner recommended that a NEL 1907N =407027agry acid powder be used to clean poolfilters and ad- Must water pH, instead of muriatic acid solution. The 11.17ML of NGOH dry acid powder is 90.0% sodium hydrogen sulfate .nza 715.5072 N (NaHSO4) and 10.0% inert filler. с Clasay Лесн (1) Calculate the number of grams of NaHSO, in 1.00 lb of dry acid powder (1 lb 453.6 g). Nahlscy is 90% (2) Calculate the normality of the undiluted muri- atic acid solution N. 10mL DIST N 250mL undiluted diluted M = 5072 N-250 mL • 10mL WYMIN=12.68M (3) Calculate the volume, in millaiters, of NaOH (2) Write the chemical equation for the neutral- solution required to titrate 1.00 mL of the undiluted mu- riatic acid. ization reaction between NaHSO, and NaOH. 453.69.90%-H05.249 Not Son NaHSO4 + NaOH 1266 N. 1 mL =1193 N. V undiluted Mal Nach V = 12.68NIML Naz Out Hall c. lazan 11=102,9 mL Section