Resolução EINSTEIN 2023 | Química | Provas I e II

Chemistry Exam Solution for the Einstein Medical School Entrance Exam 2023. In this chemistry video lesson, we will cover the chemistry exam for the Einstein Medical School 2023 entrance exam (Albert Einstein - Albert Einstein Israelite College of Health Sciences). For those unfamiliar with the chemistry exam for the Albert Einstein Medical School (Medicine), it consists of two parts: Exam I - 5 multiple-choice questions (alternatives) Exam II - 1 analytical-discursive chemistry question Index of Question Solutions for the Einstein 2023 Exam 00:39 - Question 31 Look at the image. A tea is prepared by steeping a tea bag containing herbs in hot water. During this preparation, two processes of separating the mixtures occur: Answer Key - solvent extraction and filtration. 04:17 - Question 32 One of the main sources of lithium compounds is the mineral spodumene, whose chemical composition is given by the formula LiAlSi2O6. The lithium content in spodumene, expressed as a percentage by mass, is Answer - 3.7% 07:34 Question 33 The pH of apple juice ranges from 2.9 to 3.3, and the pH of carrot juice ranges from 4.9 to 5.3. Based on this information, it can be stated that apple juice, compared to carrot juice, is, on average, Answer - 100 times more acidic. Learn more about pH and pOH in this video lesson -    • pH e pOH | Equilíbrio Químico | Aula 15   Learn more about pH variation in this video lesson -    • Variação do pH | Equilíbrio Químico | Aula 16   11:47 Question 43 A student decided to copper-coat a stainless steel object by electrolytically depositing a layer of metallic copper on it. To do this, he assembled the electrolytic tank illustrated below and let it run for 80 minutes under a constant current of 200 mA. Considering that the Faraday constant (F) is 96,500 C/mol, it is estimated that the mass of metallic copper deposited on the stainless steel object in this process was approximately Answer - 0.3g Learn more about electrolysis with active electrodes -    • Eletrodeposição | Galvanoplastia | Eletról...   Learn more about electrolysis stoichiometry -    • LEIS DE FARADAY | ESTEQUIOMETRIA DA ELETRÓ...   5:17 PM Question 35 The polymer known as "green plastic" is polyethylene produced from ethylene derived from ethanol, a renewable resource, instead of ethylene from petroleum, a fossil material. The reaction to obtain ethylene from ethanol occurs by the following mechanism: This reaction is an example of _____ dehydration, in which the chemical species represented by ______ acts as a catalyst. Answer Key - Intramolecular and H+ Learn more about elimination reactions -    • Reações de Eliminação | Aula 44   Learn more about catalysts -    • Catalisador | Cinética Química | Aula 05   11:17 PM Question 02 (Essay Exam - Albert Einstein Medicine 2023) The formula below represents the molecular structure of malic acid, present in some fruits, including apples and pears. a) Explain why malic acid is practically insoluble in n-hexane. Identify the other organic function present in the structure of malic acid, in addition to the carboxylic acid organic function. b) Using structural formulas, write the chemical equation that represents the complete neutralization reaction of malic acid with NaOH. Calculate the amount, in moles, of NaOH required to completely neutralize 100 mL of a saturated aqueous solution of malic acid at 20 °C. 🔔 SUBSCRIBE TO THE CHANNEL - https://bit.ly/3zY1x21 👍 Did you like the video? Leave a LIKE! Follow me on social media: ✏️Instagram:   / prof_igor_quimica   ✏️Twitter:   / igorsuga   ✏️Blog: https://igorsuga.wordpress.com/ #chemistry #igorchemistry #medicineeinstein #einstein #questionsolving #testsolving #medicine #medstudent #entranceexam #entranceexams #solvedtests #organicchemistry #enem