PH | CourseNotes

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water pollution

environmental science

Aquatic ecology

Environmental chemistry

water

PH

Biolab Response Sheet Name: Date: 15th Jan 2015 Name of Bio lab: Assessing Water Quality Page: Unit: Biodiversity and Conservation Brief Description of Your Procedure: Summarize what you did for this activity. Describe any modifications of procedure you used. I used the pipette to dispense three drops of carbonic acid into the aquarium. Then I looked at the pH level and the population data and recorded them. Analyze and Conclude Questions Question 1

AP Chemistry Zumdahl 7E Chapter 14 Notes

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Brønsted–Lowry acid–base theory

Bases

Acids

Acid dissociation constant

Acid

PH

Weak base

1 Chapter 14 - Acids and Bases 14.1 The Nature of Acids and Bases A. Arrhenius Model 1. Acids produce hydrogen ions in aqueous solutions 2. Bases produce hydroxide ions in aqueous solutions B. Bronsted-Lowry Model 1. Acids are proton donors 2. Bases are proton acceptors 3. H3O+ is called the hydronium ion C. Conjugate Acid-Base Pairs 1. A conjugate base is what remains after an acid has donated a proton a. Cl- is the conjugate base of HCl 2. A conjugate acid is what is formed when a base accepts a proton base acid acid base 3. HCl is a stronger base than H3O+ (H+) so the equilibrium lies far to the right D. Acid Dissociation Constant 1. ][ ]][[ HCl ClHKa -+ = a. water is not included because, in dilute solution, the concentration of

Chemistry

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Pipette

Acid

Graduated cylinder

PH

Grace Doran 10/28/15 Grade 9 Liver Catalase Lab Purpose: The experiment was conducted in order to test whether or not the liver catalase performed different when denatured. Also to test what happens when we change the pH of the reaction. Introduction/ Background Information: A liver is vital in getting rid of toxic substances in the body. It uses enzymes which are proteins that help to complete chemical reactions. The enzyme used in the liver is a catalase enzyme. This enzyme helps to break down hydrogen peroxide (H2O2) into water and oxygen. However enzymes may under extreme heat or pH levels may become denatured and nonfunctional.

Bio Inquiry Lab on Enzymes

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Catalysis

Enzyme catalysis

PH

Enzyme

Chemical reaction

Meredith Robbins Inquiry Lab (PH) 10/27/14 Research Question: What conditions would affect the rate of an enzymatic reaction? Null Hypothesis: The Ph and the temperature will not have an effect on the rate of enzymatic reactions. #1 Alternative Hypothesis: The Ph and temperature will have an effect on the rate of enzymatic reactions. #2 Alternative Hypothesis: The Ph and temperature will not have an effect on the rate of enzymatic reactions. Control group: The Ph level of 7 (neutral) Experimental group: Ph- 3, 5, 7, 9, 11 (I will get data for Ph 5 and 7) IV: the Ph level DV: the rate of the enzyme reactions

AP Bio Chp 3

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Inorganic solvents

Oxides

Acids

PH

water

Acid

AP Biology Reading Guide Chapter 3: Water and the Fitness of the Environment Fred and Theresa Holtzclaw Copyright ? 2010 Pearson Education, Inc. - 1 - Name_______________________Period___________ Chapter 3: Water and the Fitness of the Environment Concept 3.1 The polarity of water molecules results in hydrogen bonding 1. Study the water molecules at the right. On the central molecule, label oxygen (O) and hydrogen (H). 2. What is a polar molecule? Why is water considered polar? 3. Now, add + and ? signs to indicate the charged regions of each molecule. Then, indicate the hydrogen bonds. 4. Explain hydrogen bonding. How many hydrogen bonds can a single water molecule form?

2.2 Western High Biology H vocab

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Oxides

PH

Acid

?Opposite charges of polar molecules can interact to form hydrogen bonds. ?Often oxygen or nitrogen, but many other molecules. ?Weaker than covalent bonds but strong among water molecules 2.2 Vocabulary Isabella Hardman Period 7 9/2/14 ?Measures acidity ? U sually between 0 and 14 ? - 0 is very acidic (High H+) and 14 is in very basic (low H+) ?pH of 7 is neutral -Must be tightly controlled in organisms with buffers.-
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AP BIO Chapter 03

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Bases

Acid-base chemistry

Inorganic solvents

Oxides

PH

Properties of water

water

Hydroxide

Acid

Chemical reaction

Campbell's Biology, 9e (Reece et al.) Chapter 3 Water and Life Life evolved in the ocean, and the chemistry of life occurs in an aqueous environment. These questions explore the properties of water that are important to sustain life?s chemical processes, organismal physiology, and interactions of organisms with their environment. Quantitative properties such as heat content, molarity, and pH are also addressed. A few questions address how human activities affect the global environment through acid rain and acidification of the ocean. Multiple-Choice Questions 1) In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) van der Waals interactions.

AP BIO CHP 3 CAMPBELL BIOLOGY 9e

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Campbell's Biology, 9e (Reece et al.) Chapter 3 Water and Life Life evolved in the ocean, and the chemistry of life occurs in an aqueous environment. These questions explore the properties of water that are important to sustain life?s chemical processes, organismal physiology, and interactions of organisms with their environment. Quantitative properties such as heat content, molarity, and pH are also addressed. A few questions address how human activities affect the global environment through acid rain and acidification of the ocean. Multiple-Choice Questions 1) In a single molecule of water, two hydrogen atoms are bonded to a single oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) van der Waals interactions.

Basic Chem Review

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Atoms: An atom has 7 protons, 7 electrons, and 8 neutrons. Fill in the blanks below for this atom: Atomic Number _______ Mass number: _______ Charge: ________ This atom belongs to which element? Notation Atomic # Mass # # protons # neutrons # electrons Types of Bonds: Determine the Type of Bond. Hydrogen and Oxygen type of bond = __________________ Carbon and Hydrogen type of bond = __________________ Sodium and Chlorine type of bond = __________________ Solutions/Molarity Practice What is the molarity if 0.5 moles of sodium chloride is dissolved to make 0.05 liters of solution? What is the molarity if 734 grams of lithium sulfate (Li2SO4) are dissolved to make 2500 mL of solution?

Math Problems

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