Read and follow the instructions carefully. For short-answer…
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Reаd аnd fоllоw the instructiоns cаrefully. For short-answer questions, answer them in complete sentences. In this case, an isolated word answering the question will be rejected. Review your answers, check for missing Spanish characters, and capitalize the letter that must be capitalized. The answers to the exam’s questions are case-sensitive, and students will lose points if they do not capitalize the letter that must be capitalized, miss accent marks, or use the letter N instead of Ñ. Special Spanish characters will be provided in each question, even though you may not need them in all questions. You will be allowed to copy and paste ONLY those special characters, or you can use the codes to introduce Spanish characters in a text. Exams Rubrics SPAN 111 Topics Points reduction for each mistake[1] Errors Grammar -0.5 point Word order in the sentences -0.5 point Adjectives placement -0.5 point Incorrect verb (ser vs estar/ tener, etc.)[2] -0.5 point Wrong verb’s tense and conjugation -0.5 point Wrong pronouns (subject, reflexive, possessive, direct/indirect)[3] -0.5 point Sentence’s structure -0.5 point Missing articles (definitive or indefinite) -0.5 point Gender and number agreements Orthography - 0.5 point Misspelling -0.5 point Missing accent marks -0.5 point Missing initial question or exclamation marks -0.5 point Change N for Ñ Content -1 punto Make sense? Is it appropriate? Spanish special characters. Copy and paste as needed. Uppercase lowercase A Á á E É é I Í í O Ó ó U Ú ú Ñ Ñ ñ the umlaut Ü ü Initial question mark ¿ Initial exclamation mark ¡ [1] By default, you could lose 0.5 for each error and one point if the entire sentence does not make sense or is not appropriate. [2] Depends on which verbs have been learned up to this point in the course. [3] Depends on which of the pronouns have been learned up to this point in the course.
Answer the fоllоwing questiоn. Use the Henderson-Hаsselbаlch equаtion to calculate the pH of the solution prepared by dissolving 0.48 mol of NH3(Kb=1.77x10-5) and 0.750 mol of ammonium chloride in enough water to make 1.00L of buffer solution Chose your final answer here. After submitting the exam, upload the matching calculations to the Exam 3 Solutions, Extra Credit, and Partial Credit assignment. Answer - 4pts, work - 1pts
Answer the fоllоwing questiоn. A 25.00 mL аliquot of the weаk аcid solution (HA) was titrated with 0.1050 M KOH(aq) using both an indicator and a pH meter. Ka (HA), is 1.68 x10-4. A total of 25.64 mL of 0.1050 M KOH(aq) was required to reach the equivalence point 1. Calculate the molarity of the acid solution. (4 pts) 2. Calculate the pH of the acid solution (Hint: use the RICE table). (4 pts) 3. Calculate the pH and [A-] at the half-equivalence point. (4 pts) 4. Calculate the pH at the equivalence point of the titration. (Hint: ignore the spectator potassium ion and use Kb for hydrolysis of A- anion and RICE table). (4 pts) Calculate the pH of the solution after 20.00 mL of 0.1050 M KOH(aq) was added. (Hint: ignore the spectator potassium ion and find moles of acid and A- and use Henderson-Hasselbalch equation). (2EC) Submit your final answers here. After submitting the exam, upload the matching calculations to the Exam 3 Solutions, Extra Credit, and Partial Credit assignment. LC