Chemistry, 29.02.2020 04:59 vivian2020

Directions: Answer the following questions in complete sentences. a. Describe four properties of acids that you learned in this lesson. b. Describe four of the properties of bases that you learned in this lesson. c. What are the products produced when an acid and base react together? d. Now it is time to do a scavenger hunt around your house to find more examples of acids and bases. Be sure to check in your fridge, medicine cabinet, and in the cleaning supplies. e. Don’t forget to read the labels on products to find the names or formulas of acids and bases they may contain. f. Find at least five acids and five bases for your list, making sure that there are some items on your list that were not mentioned in the lesson. Whenever possible, list the product/item and the formula or name of the acid or base.

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Answers

Answer from: melisa18

see below

Explanation:

a. Describe four properties of acids that you learned in this lesson.

1. Acids taste sour

For instance, taste some lemon juice

2. Acids are corrosive

Acids in contact with organic tissue or metals attack and, eventually, can destroy them. For instance chloric adis and sulfuric acid. Acids burn the skin.

3. Acids react with metals releasing hydrogen gas

For instance:

$2HCl(aq)+2Na(s)\rightarrow 2NaCl(aq)+H_2(g)\uparrow$

4. The pH of acids is below 7.

pH is the negative logarithm of the hydrodium concentration. HIgh concentrations of hydronum yield low pH: For instance:

$[H_3O]=2.0M \impliespH=-log\dfrac{1}{[H_3O^+]}=-log\dfrac{1}{2}=0.3$

5. Acids conduct electricity:

Acids ionize in water, producing hydronium ions. The ions carry charge. The motion or flow of charge is electric current.

b. Describe four of the properties of bases that you learned in this lesson.

1. Bases taste bitter

For instance, taste some soap

2. Bases are caustic and corrosive

Bases also damage organic tissue and attack metals. Thus they are corrosive such as acids. But strong bases are also named caustic. They cause damage similar to burns but in a different way.

3. The pH of bases is above 7.

pOH is the negative logarithm of OH⁻ ion. And pH + pOH = 14

$[OH^-]=1.0\impliespOH=-log(1/1.0)=-log(0.1)=1\\ \\ pH=14-pOH\\\\pH=13$

4. Bases conduct electricty.

Bases ionize in water releasing OH⁻ which carry charge, the flow of charge is current.

c. What are the products produced when an acid and base react together?

Acids and bases react together neutralizing each other, producing salt and water.

For instance:

$HCl+NaOH\rightarrow NaCl(salt)+H_2O(water)\\\\\\HNO_3+NaOH\rightarrow NaNO_3(salt)+H_2O(water)$

d. Examples of acids and bases. Be sure to check in your fridge, medicine cabinet, and in the cleaning supplies.

From fridge (or the food pantry):

Tomato juice: acidLemon juice: acidOrange juice: acidsoda beverages: acidvinegard: acidbaking soda: base

From medicine cabinet:

aspirin: acidibuprofen: acid

Cleaning supplies:

muriatic acid: acidsoap: basebleach: basehousehold ammonia: baselye: base

e. Names or formulas of acids and bases they may contain.

Tomato juice, lemon juice, and orange juice contain citric acid: C₆H₈O₇Baking soda is sodium bicarbonate: NaHCO₃Vinegar is diluted acetic acid: CH₃COOHSoda beverages: contain carbon dioxide CO₂, and some may contain phosphoric acid H₃PO₄Muriatic acid is diluted hydrochloric acid: HClaspiring is actyilsalicylic acid: C₉H8O₄ibufrofen is isobutylphenylpropionic acid.soap: chemically they are fatty acids metal salts.bleach is sodium hypochlorite: ClOH.Lye is sodium hyroxide: NaOHHosehold ammonia: NH₄OH

f. Find at least five acids and five bases for your list, making sure that there are some items on your list that were not mentioned in the lesson. Whenever possible, list the product/item and the formula or name of the acid or base.

Acids:

citric acid: C₆H₈O₇soda beverages: carbon dioxide, CO₂vinegard: acetic acid: CH₃COOHaspirin: acetylsalicylic acidibuprofen: isobutylphenylpropionic acidmuriatic acid: HCl

Bases:

baking soda: sodium bicarbonate: NaHCO₃soap: fatty acid metal salts.bleach: sodium hypochlorite: HClOhousehold ammonia: NH₄OHlye: sodium hydroxide: NaOH

Answer from: Quest

the grams of barium that are in 2.3 x 10^23 atoms of barium is 52.4 g (answer c)

calculation

mass = moles of ba x molar mass of ba

molar mass of ba from periodic table= 137.3 g/mol

use the avogadro's law constant to calculate the moles of barium

that is 1 mole = 6.02 x 10^23 atoms

? moles = 2.3 x 10^23 atoms

by cross multiplication

=(1 mole x 2.3x 10^23 atoms) / 6.02 x10^23 atoms)= 0.382 moles

mass is therefore = 137.3 g/mol x 0.382 mol = 52.4 ( answer c)

explanation:

Answer from: Quest

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .

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