II: Titration with a pH Meter 1. Fill the 50-milliliter buret with a 0.25 molar NaOH solution. 2. Record volume. 3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution. This amount must be different than the amount used in part I. 4. Record volume. 5. The amount of unknown HCl is then added to the 100-milliliter Erlenmeyer flask. 6. Insert the pH meter into the Erlenmeyer flask and record the initial pH of the acid. Remember to record the pH of the solution after
Premium PH Hydrochloric acid Titration
Chemical Change Lab Name Data Table 1: |Chemicals |Well # |Reaction on White Paper |Reaction on Dark Paper | |NaHCO3 + HCl |A6 |Remains clear. |Remains clear. | |HCl + Blue Dye |B6 |Orange color. |Cannot distinguish color
Premium PH indicator PH Blue
RATING SCALES INTRODUCTION Rating scales‚ as the name implies‚ are scales for rating each of the characteristics or activities one is seeking to observe or assess. A rating scale is a set of categories designed to elicit information about a quantitative or qualitative attribute. They enable an observer to systematically and objectively observe a person and record those observations. In the social sciences‚ a common example is the Likert scale in which a person is person selects the rating which
Premium Psychometrics Likert scale
pH and Microbial Growth Introduction: Each organism has an optimum environment for growth‚ which includes pH level. Organisms that grow at near neutral pH levels are called neutrophiles. Those that grow best in acidic pH values are called acidophiles. Others‚ yet‚ grow best in alkaline pH values and are called alkaliphiles. In this lab‚ each group was assigned an organism‚ which was then used to inoculate 6 different pH levels. Materials and Methods: Followed lab procedure 29‚ “pH and
Premium PH Bacteria
Likert Scales …are the meaning of life: Dane Bertram Note: A glossary is included near the end of this handout defining many of the terms used throughout this report. CPSC 681 – Topic Report Dane Bertram Likert Scale \lickurt\‚ n. Definition: A psychometric response scale primarily used in questionnaires to obtain participant’s preferences or degree of agreement with a statement or set of statements. Likert scales are a non‐comparative scaling technique and a
Premium Likert scale Statistics Psychometrics
Grading Scale 2 Robert Hernandez English 102 Research paper Grading Scale Anyone who has attended a high school or college will readily say that one of the most stressful aspects of the entire experience is grades. Students will loose hours of sleep per night poring over textbooks‚ clutching a pen in one hand and a mug of Starbucks coffee in the other. They soon foster an obsession with achieving and maintaining perfect grades to the point where anything that earns less than "A" is a disgusting
Premium High school Sleep
Resiliency Scales for Children and Adolescents A critical review Katie Waghorn West Virginia University March 14‚ 2014 Author’s Note This paper was prepared for COUN 505 taught by Dr. Tina Walsh Introduction Resilience is a complex construct with many definitions. Most frequently‚ resilience can be defined as one’s ability to “bounce back” from an adverse situation. It is “interactive and contextual” (Prince-Embury & Saklofske‚ 2013‚ pg.19). However‚ some believe resiliency
Premium Reliability Psychological resilience Emotion
ECONOMIES OF SCALE Economies of scale are basically the increase in efficiency of production as the number of goods being produced in a firm increases. Typically‚ a firm that achieves economies of scale lowers the average cost per unit through increased production since fixed costs are shared over an increased number of goods. Fixed costs are those costs of production that do not change when output changes. There are two types of Economies of Scale: Internal economies External economies Internal
Free Economics Management Costs
The Braden scale can identify if an individual is at risk for developing pressure ulcers. The Braden scale has a numerical (6-23) rating system based on ones sensory perception‚ skin exposure to moisture‚ physical activity‚ mobility‚ nutrition‚ and risk for friction and shearing (Braden‚ Maklebust‚ & Maklebust‚ 2005). A lower Braden Scale Score is and indicator that an individual is at a greater of developing a pressure ulcer due to ones lowers level of functioning. Whereas a higher score indicates
Premium Nutrition Obesity Hypertension
Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
Premium Hydrochloric acid Hydrogen Chlorine