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What quantity (moles) of NaOH must be added to 1.0 L of

Chemistry | 8th Edition | ISBN: 9780547125329 | Authors: Steven S. Zumdahl ISBN: 9780547125329 153

Solution for problem 47 Chapter 15

Chemistry | 8th Edition

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Chemistry | 8th Edition | ISBN: 9780547125329 | Authors: Steven S. Zumdahl

Chemistry | 8th Edition

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Problem 47

What quantity (moles) of NaOH must be added to 1.0 L of 2.0 M HC2H3O2 to produce a solution buffered at each pH? a. pH pKa b. pH 4.00 c. pH 5.00 4

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WHAT YOU SHOULD KNOW FROM LECTURE What are some empirical study examples of propinquity effects on interpersonal attraction On what evidential basis can it be concluded that propinquity effects are powerful, enduring, intuitive, and not explicit ­ Festinger et al 1950; ­ Housing complex study: ­ People who live next door are 4x more likely to be friends than people who live at opposite ends of the hallway ­ People who live upstairs will be 2x more likely to be friends with people downstairs than they would with people who live in the middle of the hallway ­ Building 17 had the fewest friendships ­ Beck et al 2008 ­ Seating Arrangements Study ­ Comparison of friendship intensity: ­ Neighboring seats > same row ­ Same row > different rows ­ Why propinquity effects are powerful, enduring, intuitive and not explicit ­ When we list out factors we want in a mate, we don’t usually list propinquity as an element, and yet these results show that it plays a huge role in developing interpersonal relationships ­ Eg we have the implicit understanding that the course of having a “celebrity crush” can be drastically changed if the person is placed in closer & consistent contact with the celebrity (ie in an internship with the celebrity) What is assortative mating A mating pattern and a form of sexual selection in which individuals with similar genotypes and/or phenotypes mate with one another more frequently than would be expected under a randommating pattern. What are examples of ways in which mates are similar What is the difference between mate similarity due to active phenotypic assortment and mate similarity due to social homogamy ­ “Active Phenotypic Assortment” Hypothesis: ­ Whatever your phenotypic traits are, you are always out there in the world actively searching for a mate that has desirable characteristics ­ “Social Homogamy” Hypothesis: ­ When you meet someone who has a lot in common with you in ways that are important to you, you might end up with them NOT because you’re actively seeking them out BUT because they’re like the people that you spend the most time with ­ There is evidence for both BUT social homogamy effects are kinda more powerful ­ **Propinquity + Social Homogamy = Strong influences on our developing strong/important relationships** Research has shown that the very same person can be judged as more or less attractive depending on a variety of contextual factors. Be familiar with such factors as physiological arousal, mood, perceived scarcity, alcohol consumption, the color red (also pink), bodily scent, and menstrual cycle phase and how each affects interpersonal attraction. ­ Familiarity ­ Repeated exposure enhances liking (only if first exposure was positive or neutral) ­ Because it is easier to process and perceive familiar stimuli ­ Stranger wariness & friend v foe judgements that occur within the first milliseconds of seeing someone ­ BUT new experiences are more exciting/stimulating and are thus more physiologically arousing whereas familiar interactions have the opposite effect and result in more relaxed, comfortable feelings luteal phase > menstrual phase ­ Smile ­ Duchenne Smile > Pan American Smile ­ Overall TakeAway How do personality and social status affect interpersonal attraction Personality ­ Positive emotion ­ Warmth & kindness (think of seeing a pic of them with babies/puppies) ­ Sense of humor (very powerful) ­ When you can make someone else smile, you geel great and the other person is more attracted to you ­ Same principle works when we are talking to babies to make them laugh or relax ­ **Same person can be more attractive when THEY are in a positive mood and/or elicit positive emotion from US Social Status ­ Material Resources ­ Power (physical, mental, social) ­ competence/confidence ­ Focus of attention (celebrity) ­ Locally defined​ : unlike phsyical appearance (which has a pretty set criteria), social status is more local/whether that’s being the best dancer, smartest, singer in your socail network. The person who is most accomplished in whatever it is (locally valued) is the “top” preferred. According to a study of over 10,000 people in 37 different cultures, how were male and female respondents similar and different in what traits they reported seeking in a long­term mate ­ Same top 12 responses, just ordered differently after the first 4: ­ ­ Pair A: warm > wealthy M/W, ST/LT ­ Pair B: attractive > warm M/W ST; warm > attractive M/W LT ­ Pair C: attractive > wealthy for M/W, ST/LT How does reciprocal liking affect interpersonal attraction What about playing “hard to get” ­ Appeal of those who find us attractive ­ If someone doesn’t like you: “they’re probably a jackass” ­ If someone likes you: “they’ve got good taste” ­ We love people who are ​ hard​ for other people ​to get According to the process model of mate selection presented in lecture, how do the multitude of factors (including propinquity, similarity, familiarity, appearance, personality, status, context, and reciprocal liking) help narrow the large pool of potential mates down to one ­ The reciprocal liking point is the ‘tipping point’: when you realize that you DO have a chance to get the person that is hard for everyone else to get AND that you like them Be familiar with the symptoms of romantic infatuation, its average duration and time course, its underlying neurochemistry, and its theorized function.​ ­ Acute onset ­ Come on all of a sudden ­ Physiological Arousal ­ Feel like they have a lot more energy BUT they eat and sleep less ­ Mental Preoccupation****** ­ Imp feature of romantic infatuation ­ It’s all youre thinking about all the time. BUT it’s INTRUSIVE thinking ­ Mood Dependency ­ Emotional roller coaster­­depends on if the person they’re interested in is interested back ­ Idealization ­ Arguably the most dangerous features of romantic infatuation ­ You overlook the negative aspects that could potentially be disastrous ­ Single Target ­ You can only be infatuated with one person at a time (b/c it takes SO much energy) ­ **Note: men become infatuated more quickly than women**

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Chapter 15, Problem 47 is Solved
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Textbook: Chemistry
Edition: 8
Author: Steven S. Zumdahl
ISBN: 9780547125329

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