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Natali5045456 [20]
3 years ago
14

1.I make my cup of coffee in the morning by pouring boiling water over ground-up coffee beans held in a special piece of paper a

nd by collecting the brown liquid that comes through. Which techniques of the five described in the background section is/are used in the preparation of the cup of coffee
Chemistry
1 answer:
777dan777 [17]3 years ago
5 0

Answer:

Filtration

Explanation:

Filtration is a physical separation technique that is used to separate solids from liquids or gases. The process involves the use of a filter which allows just the liquid to pass through.

In this case, the coffee beans is the solid and the boiling water is the liquid. The special piece of paper is the medium (filter) through which the coffee is collected.

The coffee coming through the special piece of paper (filter) is called a filtrate.

Filtration is used in the preparation of the cup of coffee.

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Answer:

strength = 10⁻²/10⁻³ = 10 times more acidic

Explanation:

1. A solution with a pH of 9 has a pOH of

pH + pOH = 14 => pOH = 14 - pH = 14 - 9 = 5

2. Which is more acidic, a solution with a pH of 6 or a pH of 4?

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soln with pH = 2 => [H⁺] = 10⁻²M

soln with pH = 3 => [H⁺] = 10⁻³M

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4. What is the hydrogen ion concentration [H + ] in a solution that has a pH of 8?

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5. A solution has a pOH of 9.6. What is the pH? (Use the formula.)

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Answer:

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