Objective Background Calibrating a Simple Hydrometer

Slides:

Advertisements

Similar presentations

Graphing in Physics.

Advertisements

GO TO WEBPAGE…L.G. AND NOTES GO TO UNIT 1 VOCABULARY AND BIG IDEA SHEET.

DENSITY Density – Density is how much mass is packed into

Sugar Content Analysis

Chemistry Notes Density. density – the mass of an object per unit volume ex) the density of a substance describes how tightly packed the molecules are.

Unit 4: TOXINS Stoichiometry, Solution Chemistry, and Acids and Bases

Density & Graphing Review Sheet Answers

Buffer Solutions a weak acid and its conjugate base, or

Question: What is the density of an orange

Use what you know to convert.35 km/hr to m/min. Graphing in Physics.

Data Analysis Sugar Content in Beverages. Step 1 – The Calibration Curve Page 2 of the procedure presents a table of “Percent Sugar” vs. “Density at 20°C.”

Osmosis Lab. Definition of Osmosis WATER moves from an area of HIGH to LOW concentration across a semipermeable membrane.

Notes – Unit One Measurements and Properties of Materials.

Objective Background Constructing & Calibrating a Simple Hydrometer

Error in Measurement Some error or uncertainty always exists in any measurement. – skill of the measurer – limitations of measuring instruments.

GRAPHING A “PICTURE” OF THE RELATIONSHIP BETWEEN THE INDEPENDENT AND DEPENDENT VARIABLES.

Density. The two things we need for density are mass and volume Balance is used to measure mass Balance is used to measure mass Read each rider and add.

Density Definition- the ratio of the mass of an object to it’s volume

Chapter 5: Density and Buoyancy

Experiment 33 Colorimetric Determination of Iron CHE1181.

Make a better Hydrometer On the front table is a variety of supplies to make a better hydrometer. Your mission will be to create a better hydrometer to.

Page 1 We will cover: Data Tables Line Graphs Bar Graphs Circle Graphs We will cover: Data Tables Line Graphs Bar Graphs Circle Graphs.

Scientific Methods I Peter Popper plants prodigious plots of pea plants. Every week Peter measures the height of his pea plants and records the results.

Lab 4 Fractional Distillation Objective - To separate a mixture of two liquids by collecting vapors at their boiling point.

Earth Science September 7th DO NOW: Write a sentence which explains how the terms “senses,” “observations,” and “inferences” relate to each other. Then,

Graphing Function Charts. X Y I Y = 2X + 1 X Y ½ Y - intercept 0, 1 X - intercept -½, 0.

Solubility Practice Problems

Salt Solutions: Preparation, Density, and Concentration Relationships.

Measuring the pH of Orange Juice

ANATOMY OF A LINE CHART Line Charts are used to present data trends over time. They may present a single variable or be used to compare multiple variables.

Solubility Lab.

Colorimetric Determination of Iron

Sign in: front of lab Pick up graded papers

Sal College of Engineering

Introduction to Earth Science

Why should we display our data in graphs and Tables?

Let’s Organize the Data!

Instructions for Making a Bar Graph

VERTICAL LINE TEST GRAPHS can represent functions.

Sugar Content Analysis

Graphing Why Do We Do It?.

You might want to start your title ‘A graph to show....’

Lab 2: Density Determinations

Solubility and Solubility Curves

Solutions to the Mass, Volume Density Problems.

Make sure your numbers are underneath the dash!!

(Characteristic property)

Making a Scientific Graph

U4-14 TITLE Predicting Periodic Properties PURPOSE To predict the density germanium using calculated densities for silicon, tin, and lead. HYPOTHESIS The.

Mass, Volume, & Density.

Graphing Skills.

Data Management & Graphing

Sugar Content Analysis

Error in Measurement skill of the measurer

Unit 1 Notes: Graphing & Density

Graphing and equations

Lab 8 The Density of Water Purpose Background PART 1

Reading, Constructing, and Analyzing Graphs

Multiplying with Scientific Notation

Presentation transcript:

Objective Background Calibrating a Simple Hydrometer Lab 5 Calibrating a Simple Hydrometer Objective Determine the sugar concentration of a solution using a hydrometer. Background A hydrometer measures the density of a solution by floating. The higher the hydrometer floats, the more dense (concentrated) the solution is.

Experiment

Pour about 50.0 mL of pure water into a 50 mL grad. cyl. Measure the height of the stem above the liquid level. Prepare your solutions using tap water and the correct grams of sugar.

Height of Stem Above Water Level (cm) Sugar Solution Height of Stem Above Water Level (cm) Pure Water (0%) Tap Water 2% 4% 6% 8% Unknown

Analysis 1. Create a graph that displays the height of the hydrometer stem vs. sugar concentration. Place the sugar concentration on the horizontal axis and the stem height (in cm) on the vertical. Connect the dots on this graph with a ‘best fit‘ line. This is your calibration curve. Don’t forget to label the axis’s, units, and give a title to the graph. 2. Use your calibration curve to determine the approximate sugar concentration in the unknown. Results

Questions 1. Why is it important that no water was added to the hydrometer during this lab? 2. Name three sources of error in this experiment. 3. What is a hydrometer? 4. People claim that it is easier to float in the ocean that in a lake or pool, explain why. 5. Was it important to always use 50 mL of solution? Explain why or why not.