Lab Practical Practice *use correct number of significant figures when solving!

Slides:

Advertisements

Similar presentations

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

Advertisements

Notebook p 29 Three Ways To Determine Density. 1) Regular Objects 1.Measure the each side of the block in centimeters. Calculate volume in cm³: multiply.

Errors in Measurements Class measurements for the density of gold (in g/mL) Group 117.8Group Group 218.0Group Group 317.9Group

DENSITY OF COLA AND DIET COLA

Title: Density Equations Date:

A Look at Density and How to Calculate It.

The steps how to calculate mass, volume, and density

Chemistry Calculations

Periodic Trends in Density Required Laboratory Skills.

Density Lab #4 April 2 – April 9 Lab Report must be in the correct format Title and headings Sections should be in the correct format and complete.

Starter 1.How would you record the following measurements? How many sig figs? a.b. 2.Count the sig figs in the following measured values: a

Accurate measurements are needed for a valid experiment.

Flashback Convert 2.58 m to kilometers. Accuracy and Precision Accuracy- the closeness of measurements to the correct value of the quantity measured.

1.07 Accuracy and Precision

Reading and Recording Measurements

Significant Figures Number of digits believed to be correct by the person doing the measuring Includes 1 estimated digit Read to 1/10 the smallest division.

Topic 11.  The material in this topic is tested any time you do a lab or calculation.  It is extremely important that you follow the rules explained.

How do you calculate the density of a substance?

Math and Measurement. Significant Figures Significant Zeros 1.Leading zeros are never significant 2.Trailing zeros only count if there’s a decimal point.

Important Information! When liquids are poured into a graduated cylinder they will not form a straight line. They will instead form a curved line that.

“The Density Equation” Mass (g) Volume (mL or cm 3 ) Density (g/mL or g/cm 3 )

Mass, Volume & Density SPS2a. Calculate density when given a means to determine a substance’s mass and volume.

Measuring  Volume  Temperature  Mass. Reading the Meniscus Always read volume from the bottom of the meniscus. The meniscus is the curved surface of.

Measurements  Dimensions  Volume  Mass Miss Fogg Fall 2015.

Density and % error. Density Density – Compares mass (amount of matter) of object to its volume (amount of space occupied) mass per unit volume (g/cm.

1 1-6 Working with Numbers. 2 Significant Digits (sig fig's) - certain digits and the estimated digit of a measurement. Significant Digits (sig fig's)

Density Miss Fogg Fall How can you tell the difference? Gold (Au): g/cm 3 Pyrite (FeS): 5.01 g/cm 3.

Significant Figures. Why use significant figures? Click on the graphic to read a story that shows the importance of understanding significant figures.

Calculating density Measuring density: 1 Find out the mass of each object with an electronic balance. Calculating density.

Calculating Density Worksheet Review.  1. How close the particles are in a substance. Or how much mass fits in a certain space.  2. Density is “owned”

What is the formula? How can density be used to identify materials?

LAB: Calculate the Density of Water Mass _____ = DENSITY Volume What is the formula for Density?

Density White Board Review Pick up a board, marker, paper towel & calculator.

The Basics of Solution Making. Making solutions with solid solutes Follow the steps below: –Measure out the appropriate mass of solute –Dissolve the solid.

WARM UP: October 8 th, 2013 Calculations with Significant Figures Solve and Report with the Correct Number of significant figures. Be sure to include units.

Density. Take a look at the two boxes below. Each box has the same volume. If each ball has the same mass, which box would weigh more? Why?

Copyright © Houghton Mifflin Company. All rights reserved.1 | 1 Question Which of the following is an example of a theory? a) Solution A is a darker red.

Rules for Determining Significant figures

Measuring Volume Temperature Mass.

Significant Figures in Calculations

Measuring Volume Temperature Mass.

Warm-Up: Percent Error

Experiment 2 Finding density of an object

Measuring Volume Temperature Mass.

And Calculating with Significant Digits

Density D= Mass_ Volume Mass: put matter on balance Volume:

DENSITY OF SODA AND DIET SODA

Determining if an object will float or sink

Density of Air INB 44.

Measuring Volume Temperature Mass.

Reporting Measurements

Scientific Tools of Measurement

Significant Figures Describing Scientific Measurements Density

Safety and Density.

U4-3 Density Review Write the density formula.

Finding the Density of Different Objects

Density of Liquids and Solids – Experiment 3

Significant Figures in Calculations

Copy everything in blue on your lab sheet.

2.1 Measuring the Mass and Volume of Water

Measuring Volume Temperature Mass.

Procedure for calculating density

Which of these numbers has the most significant figures E 5

A closer look at the physical property of Density

Lab 8 The Density of Water Purpose Background PART 1

Presentation transcript:

Lab Practical Practice *use correct number of significant figures when solving!

Lab Practical Practice Significant Figures – numbers that are part of a measurement. How many significant figures are in the numbers below? ,450,0006, ,000.00

Lab Practical Practice Solve the following: Significant Figures in calculations. 110 m x 6 m = g g. = ( mL – mL) / g. =

Lab Practical Practice A gas cylinder having a volume of 10.5L contains 36.8g of gas. What is the density of the gas?

Lab Practical Practice Calculate the volume of 25.0 g of each of the following using the table above. – Mercury – Oxygen – Water SubstancePhysical StateDensity (g/mL) OxygenGas WaterSolid1.000 MercuryLiquid13.6

Lab Practical Practice When you are using a four beam balance, what should your measurement go to when using certain and uncertain digits? What about a three beam balance?

Lab Practical Practice When using a 100mL graduated cylinder to measure volume, in what place should the uncertain digit be in? (the graduated cylinder increases by ones)

Lab Practical Practice Sally measures a liquid in a 100mL graduated cylinder during a lab. She reads it as 23.mL. Is this an accurate measurement? If not, what is wrong and how would you correct it?

Lab Practical Practice Danny needs to use the four beam balance to measure a block of zinc. How should he go about doing this? (be specific)

Lab Practical Practice Let’s say you had to find the density of a bouncy ball. All you have set before you are a graduated cylinder and a four beam balance. What are some possible errors that occur while performing the lab?