A. Because it does not react with water
B. Because it does not contain hydrogen ions (H+)
C. Because it contains hydrogen ions but not chloride ions (Cl-)
D. Because hydrogen is bonded to chlorine in dry HCl and not dissociated
For those aiming to excel in their ATI TEAS test and secure admission into their desired nursing program, ExamGates offers an invaluable resource. Our platform features practice questions meticulously crafted by tutors who have previously aced the exam themselves. With ExamGates, you can access content that is 100% relevant to the test, accompanied by vivid images and illustrations. Additionally, our platform provides comprehensive explanations for both correct and incorrect answers, empowering you to fully grasp the material and optimize your study efforts. Take the first step towards your nursing aspirations with ExamGates today.
A) Because it does not react with water: While dry hydrogen chloride gas does not react with water, the absence of this reaction does not inherently determine its acidity. Acidity is determined by the presence of hydrogen ions in solution.
B) Because it does not contain hydrogen ions (H+): Dry hydrogen chloride gas does not contain free hydrogen ions, which are characteristic of acidic solutions. However, the absence of hydrogen ions alone does not explain why dry hydrogen chloride gas is not acidic.
C) Because it contains hydrogen ions but not chloride ions (Cl-): Dry hydrogen chloride gas does not contain free chloride ions, but the presence of hydrogen ions is crucial for acidity. However, the absence of chloride ions alone does not fully explain why dry hydrogen chloride gas is not acidic.
D) Because hydrogen is bonded to chlorine in dry HCl and not dissociated (Correct Answer): Dry hydrogen chloride gas does not dissociate into hydrogen ions (H+) and chloride ions (Cl-) because there is no water present to facilitate dissociation. Therefore, it does not exhibit acidic properties in the absence of dissociation.
Therefore, the Correct Answer is D.
What ions make ammonia solution alkaline?
A. Cl- ions
B. H+ ions
C. Na+ ions
D. OH- ions
The Correct Answer is D.A) Cl- ions: Chloride ions (Cl-) are typically found in salts and do not contribute directly to the alkalinity of ammonia solution.
B) H+ ions: Hydrogen ions (H+) typically characterize acidic solutions, not alkaline solutions. Ammonia solution doesn't contain H+ ions.
C) Na+ ions: Sodium ions (Na+) are typically found in salts and do not contribute directly to the alkalinity of ammonia solution.
D) OH- ions (Correct Answer): Ammonia solution becomes alkaline due to the presence of hydroxide ions (OH-). Ammonia (NH3) reacts with water to form ammonium ions (NH4+) and hydroxide ions (OH-), increasing the concentration of OH- ions and making the solution alkaline.
Why is ethanoic acid a weak acid?
A. Because it reacts slowly with bases
B. Because it forms a basic solution when dissolved in water
C. Because it only partially dissociates in solution
D. Because it has a low pH value
The Correct Answer is C.Rationale for each choice:
A) Because it reacts slowly with bases: The rate of reaction with bases does not determine whether an acid is weak or strong. Ethanoic acid's reaction rate with bases is not a primary factor in its classification as a weak acid.
B) Because it forms a basic solution when dissolved in water: This statement is incorrect. Ethanoic acid is an acid and forms acidic solutions when dissolved in water.
C) Because it only partially dissociates in solution (Correct Answer): Ethanoic acid is considered a weak acid because it only partially dissociates into hydrogen ions (H+) and acetate ions (CH3COO-) in solution. This partial dissociation results in a lower concentration of hydrogen ions compared to strong acids.
D) Because it has a low pH value: While weak acids generally have higher pH values compared to strong acids, the pH value alone does not determine whether an acid is weak or strong. Ethanoic acid's weak acidity is primarily attributed to its partial dissociation in solution, rather than its pH value.
:pH is a measure of how acidic or basic a substance is. The pH scale ranges from:
A. 0–7
B. 7–14
C. 0–14
D. 1–10
The Correct Answer is C.A. 0–7: This range corresponds to acidic solutions on the pH scale. A pH value below 7 indicates acidity.
B. 7–14: This range corresponds to basic solutions on the pH scale. A pH value above 7 indicates alkalinity.
C. 0–14 (Correct Answer): The pH scale ranges from 0 to 14, covering the entire spectrum of acidity and alkalinity. A pH value of 7 is considered neutral, while values below 7 indicate acidity and values above 7 indicate alkalinity.
D. 1–10: This range does not encompass the full range of the pH scale. The pH scale extends beyond 10 for alkaline solutions and below 1 for highly acidic solutions. Therefore, this choice is incorrect.
What is the formula of ammonium sulfate?
A. NH4SO4
B. (NH4)2SO4
C. (NH4)SO4
D. (NH3)2SO4
The Correct Answer is B.A) NH4SO4: This formula suggests a compound where one ammonium ion is combined with one sulfate ion, which is not the correct composition of ammonium sulfate.
B) (NH4)2SO4 (Correct Answer): This formula correctly represents ammonium sulfate, indicating that it consists of two ammonium ions (NH4+) and one sulfate ion (SO4^2-).
C) (NH4)SO4: This formula suggests a compound with one ammonium ion combined with one sulfate ion, which is not the correct composition of ammonium sulfate.
D) (NH3)2SO4: This formula suggests a compound where two ammonia molecules (NH3) are combined with one sulfate ion, which is incorrect. Ammonium sulfate contains ammonium ions (NH4+), not ammonia molecules (NH3).
What do bases react with?
A. Acids to produce salts and water
B. Salts to produce acids and water
C. Water to produce acids and salts
D. Neither acids, salts, nor water
The Correct Answer is A.A) Acids to produce salts and water (Correct Answer): Bases react with acids to form salts and water. This reaction is a common characteristic of bases, where they accept protons (H+) from acids to form water and salts.
B) Salts to produce acids and water: Bases typically do not react with salts to produce acids and water. The reaction between a base and a salt is not a common reaction in chemistry.
C) Water to produce acids and salts: Bases do not react with water to produce acids and salts. Bases can ionize in water to produce hydroxide ions (OH-) but do not typically react with water to produce acids and salts.
D) Neither acids, salts, nor water: Bases do react with acids to form salts and water, making choice D incorrect. Bases do not react with salts or water to produce acids, salts, or water.
What is produced when an acid reacts with a metal hydroxide?
A. Salt and water
B. Carbon dioxide and water
C. Oxygen gas and water
D. Hydrogen gas and water
The Correct Answer is A.A) Salt and water (Correct Answer): When an acid reacts with a metal hydroxide, a salt and water are typically produced. The metal in the metal hydroxide combines with the acid to form a salt, and water is produced as a byproduct of the reaction.
B) Carbon dioxide and water: This reaction occurs when an acid reacts with a metal carbonate, not a metal hydroxide. When carbonates react with acids, carbon dioxide gas is produced along with water and a salt.
C) Oxygen gas and water: This reaction is not typical when an acid reacts with a metal hydroxide. Metal hydroxides generally do not produce oxygen gas when reacting with acids.
D) Hydrogen gas and water: This reaction occurs when an acid reacts with a metal, not a metal hydroxide. When metals react with acids, hydrogen gas is typically produced along with water and a salt.
What is a precipitate?
A. A gas formed during a chemical reaction
B. A liquid formed when two aqueous solutions react
C. A solid formed when two aqueous solutions react
D. A solution formed during a chemical reaction
The Correct Answer is C.A) A gas formed during a chemical reaction: While gases can indeed be produced during chemical reactions, a precipitate specifically refers to a solid that forms during a reaction.
B) A liquid formed when two aqueous solutions react: Precipitates are not liquids. They are solids that are formed when certain ions combine to form an insoluble compound.
C) A solid formed when two aqueous solutions react (Correct Answer): A precipitate is indeed a solid substance that forms when two aqueous solutions react and certain ions combine to create an insoluble compound.
D) A solution formed during a chemical reaction: A precipitate is not a solution. It is the solid product that separates out of a solution during a chemical reaction due to its limited solubility.
Which statement regarding metal and non-metal oxides is not true?
A. Metal oxides are bases and forms alkalis in water.
B. Non-metal oxides form acids in water.
C. Solutions of non-metal oxides change red litmus blue.
D. Metal oxides color universal indicator blue and non-metal oxides color it red.
The Correct Answer is C.A. Metal oxides are bases and form alkalis in water: This statement is generally true. Metal oxides typically react with water to form basic solutions (alkalis). Therefore, this statement is true.
B. Non-metal oxides form acids in water: This statement is generally true. Non-metal oxides typically react with water to form acidic solutions. Therefore, this statement is true.
C. Solutions of non-metal oxides change red litmus blue: This statement is not true. Non-metal oxides typically form acidic solutions in water, which would not change red litmus paper to blue. Instead, they would typically turn blue litmus paper red.
D. Metal oxides color universal indicator blue and non-metal oxides color it red: This statement is generally true. Metal oxides tend to produce basic solutions, which turn universal indicator blue. Non-metal oxides tend to produce acidic solutions, which turn universal indicator red. Therefore, this statement is true.
What do plants use the nitrogen in fertilizers for?
A. To provide energy for photosynthesis
B. To build cellulose in cell walls
C. To build amino acids and proteins
D. To regulate water uptake
The Correct Answer is D.A) To provide energy for photosynthesis: While nitrogen is essential for various metabolic processes in plants, it is not directly involved in providing energy for photosynthesis. Instead, plants use sunlight to convert carbon dioxide and water into glucose during photosynthesis.
B) To build cellulose in cell walls: Nitrogen is not directly involved in the synthesis of cellulose, which is primarily composed of glucose units. Cellulose synthesis mainly relies on carbon and hydrogen, which are obtained from carbon dioxide and water during photosynthesis.
C) To build amino acids and proteins: Plants use nitrogen from fertilizers to synthesize amino acids and proteins. Nitrogen is a crucial component of amino acids, the building blocks of proteins, which are essential for plant growth, development, and various physiological processes.
D) To regulate water uptake (Correct Answer): Nitrogen plays a role in regulating various physiological processes in plants, including water uptake. It affects the osmotic potential of plant cells and helps regulate the movement of water and nutrients within the plant.
What is produced when an acid reacts with a metal?
A. Salt and water
B. Carbon dioxide and water
C. Oxygen gas and water
D. Salt and hydrogen
The Correct Answer is D.A) Salt and water: This reaction occurs when an acid reacts with a metal hydroxide or a metal oxide. When metals react with acids, hydrogen gas is typically produced along with a salt, not water.
B) Carbon dioxide and water: This reaction occurs when an acid reacts with a metal carbonate, not a metal. When carbonates react with acids, carbon dioxide gas is produced along with water and a salt.
C) Oxygen gas and water: This reaction is not typical when an acid reacts with a metal. Metal reactions with acids usually produce hydrogen gas along with a salt.
D) Salt and hydrogen (Correct Answer): When an acid reacts with a metal, hydrogen gas is produced along with a salt. The metal displaces hydrogen ions from the acid, forming a salt, while hydrogen gas is released as a byproduct of the reaction.