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Chapter 1: Problem 5

Is the separation method used in brewing a cup of coffee best described as distillation, filtration, or chromatography? \([\) Section 1.3\(]\)

Short Answer

Expert verified
The separation method used in brewing a cup of coffee is best described as filtration, as hot water passes through ground coffee beans and through a porous filter, separating the liquid coffee from the solid particles.

Step by step solution

01

Define Distillation

Distillation is a process of separating mixtures based on differences in their volatilities in a boiling liquid mixture. It involves heating the mixture and collecting the vapor that forms, then cooling and condensing the vapor back into a liquid.
02

Define Filtration

Filtration is a process of separating a solid from a liquid or gas by passing the mixture through a porous medium (such as a filter), which captures the solid particles while allowing the liquid or gas to pass through.
03

Define Chromatography

Chromatography is a technique used for separating components of a mixture based on their interaction with a stationary phase and a mobile phase. The stationary phase is usually a solid or liquid, while the mobile phase is a liquid or gas.
04

Compare Brewing Coffee to the Given Separation Methods

When brewing coffee, hot water is passed through ground coffee beans (a mixture of solid particles). The coffee flavor and other soluble components in the beans dissolve in the water, leaving behind the insoluble solid particles. The liquid coffee passes through a porous medium (like a coffee filter) to separate it from the solid particles.
05

Determine the Best Description for the Separation Method in Brewing Coffee

Comparing the process of brewing coffee to the three separation methods, the method that best describes this process is filtration. This is because during brewing, hot water passes through ground coffee beans and through a porous filter, separating the liquid coffee from the solid particles.

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Most popular questions from this chapter

Water has a density of \(0.997 \mathrm{~g} / \mathrm{cm}^{3}\) at $25^{\circ} \mathrm{C}\(; ice has a density of \)0.917 \mathrm{~g} / \mathrm{cm}^{3}$ at \(-10^{\circ} \mathrm{C}\). (a) If a soft-drink bottle whose volume is $1.50 \mathrm{~L}\( is completely filled with water and then frozen to \)-10^{\circ} \mathrm{C},$ what volume does the ice occupy? (b) Can the ice be contained within the bottle?

Identify each of the following as measurements of length, area, volume, mass, density, time, or temperature: (a) \(25 \mathrm{ps}\), (b) \(374.2 \mathrm{mg}\) (c) \(77 \mathrm{~K}\) (d) \(100,000 \mathrm{~km}^{2}\) (e) \(1.06 \mu \mathrm{m}\) (f) \(16 \mathrm{nm}^{2},(\mathrm{~g})-78^{\circ} \mathrm{C}\) (h) \(2.56 \mathrm{~g} / \mathrm{cm}^{3}\) (i) \(28 \mathrm{~cm}^{3}\). [Section \(\left.1.5\right]\)

(a) A bumblebee flies with a ground speed of \(15.2 \mathrm{~m} / \mathrm{s}\). Calculate its speed in \(\mathrm{km} / \mathrm{hr}\). (b) The lung capacity of the blue whale is \(5.0 \times 10^{3} \mathrm{~L}\). Convert this volume into gallons. (c) The Statue of Liberty is \(151 \mathrm{ft}\) tall. Calculate its height in meters. (d) Bamboo can grow up to \(60.0 \mathrm{~cm} /\) day, Convert this growth rate into inches per hour.

What is the number of significant figures in each of the following measured quantities? (a) \(902.5 \mathrm{~kg}\), (b) \(3 \times 10^{-6} \mathrm{~m}\), (c) \(0.0096 \mathrm{~L}\), (d) \(2.94 \times 10^{3} \mathrm{~m}^{2}\) (e) \(92.03 \mathrm{~km}\) (f) \(782.234 \mathrm{~g}\).

Two students determine the percentage of lead in a sample as a laboratory exercise. The true percentage is \(22.52 \%\). The students' results for three determinations are as follows: (1) 22.52,22.48,22.54 (2) 22.64,22.58,22.62 (a) Calculate the average percentage for each set of data and state which set is the more accurate based on the average. (b) Precision can be judged by examining the average of the deviations from the average value for that data set. (Calculate the average value for each data set; then calculate the average value of the absolute deviations of each measurement from the average.) Which set is more precise?
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