why would it be important always to use the same balance during the course of an experiment?

Always use the same balance for weighing an item before and after an experiment when determining if a change in mass has occurred. Always clean up the balance pan before and after you use the balance. You will find a brush for cleaning the balance near the balance. If the balance pan is dirty your measurement will not be correct.

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Why is it important to check the balance of an experiment?

Feb 25, 2009 · It is very important to always use the same balance during the course of an experiment. This is because it will have the same margin of error.

Why is it important to always use the same balance?

It is necessary to use the same balance during the experiment as each balance may be calibrated differently. Hence, weighing of the substance on... See full answer below.

How do you determine if two substances are the same substance?

You must use the same balance during the course of an experiment because possible calibration errors of the different balances could result in wrong measurement calculations . 2. What error is introduced in a mass determination if the object being weighed is wars?

Why is it important to use the same balance during the entire course of an experiment?

Now, when we measure several masses, it is better to stick to the same balance. If we know the errors associated with the balancing apparatus, then it will be easier to incorporate the errors in our calculation. Otherwise, we had to calculate the errors for each individual case, and this may lead to complications.

What is a balance used for in science?

balance, instrument for comparing the weights of two bodies, usually for scientific purposes, to determine the difference in mass (or weight).

What error would the block being hollow introduce into the mass measurement?

If the solid was hollow then it would cause the mass to drop and the volume to be too high. Since the density is mass divided by volume, the density will be too low.

Why do you determine a mass by difference quizlet?

Why do we typically determine the mass of objects in the laboratory by a difference method? Many substances that the mass must be determined of are crystal like and as small as a grain of sand. It is difficult to place that on a balance and get an accurate mass without losing any of it.

How do you use balance in a lab?

1:323:51How to Use an Analytical Balance - YouTubeYouTubeStart of suggested clipEnd of suggested clipClose the side doors and press the tare button to zero out the paper. Use a lab scoop to slowly addMoreClose the side doors and press the tare button to zero out the paper. Use a lab scoop to slowly add the sodium bicarbonate to the paper close the glass doors and wait for the balance to lock in its.

Which balance is used in science laboratories?

Laboratory balances are normally used to measure the weight or mass of an object to a very high degree of accuracy. A few common balances used in labs today are precision balances, compact balances, and analytical balances with readability of 0.001 g, 0.01g, and 0.0001 g respectively.

Why is it important that a scientist measure mass and not weight?

Why do scientist rely on mass rather than weight as the measurement of how much matter an object contains? Because unlike its weight, an objects mass will not change if the force of gravity changes. What system if units do scientists use to measure the properties of matter? They use the International System of Units.

Why may it be important to weigh the container before adding liquid?

Weighing a liquid, powder, or granular substance The readout will read zero with the container sitting on the pan. This allows the mass of your sample to be read directly. Add the substance to be weighed. Be careful not to spill chemicals on the balance.

What factors do you need to consider when measuring density using displacement?

Density = mass / volume. Measure the mass with a good analytical balance. Use the water displacement for the volume....Hence, some of these factors are;Concentration of atoms in the metals (closely packed e.g solid or loosely packed e.g gases). ... Temperature.Pressure, etc..

Why do you determine mass by difference?

Weighing by difference is a way to weigh materials accurately. The weight of the material is the difference between the two weights of the vial before and after you transfer the material from the vial.

Why do you measure mass by difference?

Weighing by difference is the most accurate method to measure quantitatively the mass of a solid sample. ... Upon reweighing, a lower mass is found. The difference in the two masses represents the mass of solid reagent transferred to the vessel.

When using a balance to measure the mass of a chemical?

A balance or scale is an instrument used to measure mass in the science laboratory. One common method of measuring mass is to tare the scale and measure the mass directly. For example, this is how people weigh themselves.Mar 6, 2019

What happens to the melting point of a sample when there is impurity in the sample?

If there is the presence of impurity in a sample, the melting point will decrease since the substance is no longer pure. Adding impurities to samples will cause the melting points to decrease. An example of this would be when salt is added to icy roads. The melting point of the ice then decreases, making the ice go away.

What does it mean when a substance has the same melting point?

Also means that the melting point can be used to determine the identity of the substance. If it is pure, then it will have the exact melting point that its supposed to have. E5Q2.

What does TC mean in physics?

TC means to contain, meaning that the pipet or buret will contain that certain/specified amount. E2Q6. On the basis of your experience in this experiment, briefly discuss the relative precision permitted by a graduated cylinder, a pipet, and a buret.

What does the solubility of salt in water represent?

In the introduction to this experiment it states that "the solubility of a salt in water represents the amount of solute necessary to reach a state of equilibrium between saturated solution and undissolved additional solute" Explain. This is saying that when the solubility of a salt in water is being discussed, ...

What does it mean when a solution is saturated?

a solution which does not disolve any more solute. When a saturated solution is placed in contact with additional solute, the solute neither dissolves nor is deposited from a saturated solution. You have an equalibrium at a certain temp, some of the solute is goig to the solvent, some of solvent is entering the solute.

What does solubility mean in water?

This is saying that when the solubility of a salt in water is being discussed, that means that they are talking about how much of a substance would be needed to be added to the solvent in order to reach the equalibrium. Equalibrium would be achieved when the solution and solute are balanced. Solubility means the amount of solute needed, ...

Why are there special directions?

There are special directions because of the different air pressures at different altitudes. For example, the air is thinner and has less pressure, so the time it takes for a substance cooking would be lower since there is less pressure, making the temp rise. E4Q6.