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Ch. 2 Basic Chemistry
Marieb - Essentials of Human Anatomy & Physiology 13th Edition
Marieb13th EditionEssentials of Human Anatomy & PhysiologyISBN: 9780135624340당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Marieb 13th EditionCh. 2 Basic Chemistry문제 4
2장, 문제 4

Alkaline substances include which of the following?
a. Gastric juice
b. Water
c. Blood
d. Lemon juice
e. Ammonia

검증된 단계별 안내
1
Step 1: Understand the concept of alkaline substances. Alkaline substances have a pH greater than 7, indicating they are basic rather than acidic. Acids have a pH less than 7, while neutral substances have a pH of 7.
Step 2: Analyze each option provided in the question. Determine whether each substance is acidic, neutral, or alkaline based on its typical pH value.
Step 3: Gastric juice (option a) is highly acidic, with a pH of around 1-3, due to the presence of hydrochloric acid. Therefore, it is not alkaline.
Step 4: Water (option b) is neutral, with a pH of approximately 7. It is neither acidic nor alkaline.
Step 5: Blood (option c) is slightly alkaline, with a pH range of 7.35-7.45. Lemon juice (option d) is acidic, with a pH of around 2-3. Ammonia (option e) is strongly alkaline, with a pH of around 11-12. Based on this analysis, identify the alkaline substances from the list.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

pH Scale

The pH scale measures the acidity or alkalinity of a solution, ranging from 0 to 14. A pH less than 7 indicates acidity, while a pH greater than 7 indicates alkalinity. Understanding the pH scale is essential for identifying alkaline substances, as it helps categorize solutions based on their hydrogen ion concentration.
추천 영상:
07:58
pH Scale

Alkaline Substances

Alkaline substances, also known as bases, are compounds that can accept hydrogen ions or donate electron pairs in reactions. Common examples include sodium hydroxide and ammonia. Recognizing which substances are alkaline is crucial for answering the question, as it involves identifying those with a pH greater than 7.
추천 영상:
2:36
Introduction to Blood Example 1

Common Alkaline Solutions

Certain everyday substances are known to be alkaline, such as ammonia and some cleaning agents. In contrast, substances like gastric juice and lemon juice are acidic. Familiarity with common alkaline solutions helps in distinguishing them from acidic ones, which is necessary for selecting the correct answers in the multiple-choice question.
추천 영상:
02:19
Homogenous vs. Heterogenous Solutions
관련 실천
교과서 질문

Absence of which of the following nitrogen-containing bases would prevent RNA synthesis?

a. Adenine

b. Cytosine

c. Guanine

d. Thymine

e. Uracil

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교과서 질문

Glucose is to starch as:

a. A steroid is to a lipid

b. A nucleotide is to a nucleic acid

c. An amino acid is to a protein

d. A polypeptide is to an amino acid

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교과서 질문

What lipid type is stored in fat deposits beneath the skin?

a. Triglyceride

b. Steroid

c. Vitamin D

d. Phospholipid

e. Prostaglandin

53
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교과서 질문

Important functions of water include which of the following?

a. Provides cushioning

b. Acts as a transport medium

c. Participates in chemical reactions

d. Acts as a solvent for sugars, salts, and other solutes

e. Reduces temperature fluctuations

52
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교과서 질문

Pick out the correct match(es) of element and number of valence electrons. Draw a planetary model of each atom to help you choose the best answer.

a. Oxygen—6

b. Chlorine—8

c. Phosphorus—5

d. Nitrogen—3

e. Carbon—4

94
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교과서 질문

Which of the following is (are) true concerning the atomic nucleus?

a. It contains the mass of the atom.

b. The negatively charged subatomic particles are here.

c. Subatomic particles can be ejected.

d. It contains subatomic particles that determine atomic number.

e. It contains subatomic particles that interact with other atoms.

126
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