2021-10-25

## How do you write a simple lab report?

A typical lab report would include the following sections: title, abstract, introduction, method, results and discussion. Title page, abstract, references and appendices are started on separate pages (subsections from the main body of the report are not).

## What is meant by sources of error?

Instead, sources of error are essentially. sources of uncertainty that exist in your measurements. Every measurement, no matter how precise we. might think it is, contains some uncertainly, simply based on the way we measure it.

## How do you measure gas in your home?

Inflate a balloon with the gas you want to measure. If you’re taking gas (like helium) from a tank, place the lip of the balloon tightly over the nozzle and fill it up. Or, if you want to measure air, just blow up the balloon using your mouth.

## How do you measure hydrogen gas?

The volume of hydrogen gas produced can be measured using a gas syringe.

## What are the sources of error when measuring the volume of gas?

Measurements of volume of gas collected are subject to experimental error, which could be because: some gas may escape before it can be collected in the upturned measuring cylinder. the resolution of the measuring cylinders may be different, causing different values for the volume to be recorded.

## What does 1 t represent?

Scientists work with the standard units, therefore 1/t is 1 divide by 1 second. It means the reciprocal of time, like “per second”. In rate of reaction you would be comparing the change in concentration of reactants to the change in concentration of products over time.

## How do you collect gas in an experiment?

Gases that are produced in laboratory experiments are often collected by a technique called water displacement (see Figure below). A bottle is filled with water and placed upside-down in a pan of water. The reaction flask is fitted with rubber tubing which is then fed under the bottle of water.

## How do you write an appendix in a lab report?

An appendix (plural = appendices) contains material that is too detailed to include in the main report, such as tables of raw data or detailed calculations. Each appendix must be: given a number (or letter) and title. referred to by number (or letter) at the relevant point in the text.

## What are the 3 types of errors in science?

Errors are normally classified in three categories: systematic errors, random errors, and blunders. Systematic errors are due to identified causes and can, in principle, be eliminated. Errors of this type result in measured values that are consistently too high or consistently too low.

## What is the volume of hydrogen gas collected?

Equation 1 According to Avogadro’s law, the volume of one mole of any gas at Standard Temperature and Pressure (STP = 273 K and 1 atm) is 22.4 L.

## Is boiling a chemical reaction?

Boiling waterBoiling water is an example of a physical change and not a chemical change because the water vapor still has the same molecular structure as liquid water (H2O). If the bubbles were caused by the decomposition of a molecule into a gas (such as H2O →H2 and O2), then boiling would be a chemical change.

## What is the volume of gas in a syringe?

Gas syringes come in various sizes from 500 ml to 0.25 ml and tend to be accurate to between 0.01 and 1 ml, depending on the size of the syringe.

## What do you mean by instantaneous rate?

The instantaneous rate of change is the change in the rate at a particular instant, and it is same as the change in the derivative value at a specific point. For a graph, the instantaneous rate of change at a specific point is the same as the tangent line slope. That is, it is a curve slope.

## What are the components of an acceptable laboratory report?

A formal lab report is a record of your laboratory activities and should include the following sections: Introduction, Experimental Procedure, Data, Analysis and Discussion and Conclusion. Each section is required to have a heading and should be neat, well organized and concise.

## What units are used for measuring change in mass time?

Measuring mass The change in mass of a reactant or product can be followed during a reaction. This method is useful when carbon dioxide is a product which leaves the reaction container. It is not suitable for hydrogen and other gases with a small relative formula mass , M r. The units for rate are usually g/s or g/min.

## How is gas released measured?

The volume of gas produced during a chemical reaction can be measured by collecting the gas in an inverted container filled with water. The gas forces water out of the container, and the volume of liquid displaced is a measure of the volume of gas.

## How do you write sources of error in a lab report?

Reread procedures outlined in manuals from before the experiment and your own reflective write up of the experimental steps. Recall the mechanisms you used and any problems that may have come up. This may include measurements in weighing and alterations of steps as necessary. Mark down changes from procedure.

## What is instantaneous rate of reaction?

The instantaneous rate is the rate of a reaction at any particular point in time, a period of time that is so short that the concentrations of reactants and products change by a negligible amount.

## What is instantaneous reaction give example?

Solution : NaOH+HCl→NaCl+H2O is a neutralisation reaction between strong acid and strong base. Hence, it is an example of an instantaneous reaction.

## How do you write a chemistry lab report?

Lab Report Essentials

1. Title Page. Not all lab reports have title pages, but if your instructor wants one, it would be a single page that states:​
2. Title. The title says what you did.
3. Materials. List everything needed to complete your experiment.
4. Methods.
5. Data.
6. Results.
7. Discussion or Analysis.
8. Figures and Graphs.

## How do you write an error in a lab report?

Error analysis should include a calculation of how much the results vary from expectations. This can be done by calculating the percent error observed in the experiment. The error analysis should then mention sources of error that explain why your results and your expectations differ. Sources of error must be specific.

## How do you write a source of error?

When you identify and describe a source of error, keep the following points in mind:

1. It should sound like an inherent problem that you couldn’t plausibly avoid.
2. It should be significant compared to other sources of error.
3. It needs to actually affect the results.

gas syringe

## What are some sources of error in chemistry lab?

Common sources of error include instrumental, environmental, procedural, and human. All of these errors can be either random or systematic depending on how they affect the results. Instrumental error happens when the instruments being used are inaccurate, such as a balance that does not work (SF Fig. 1.4).

## What are examples of systematic errors?

Systematic errors primarily influence a measurement’s accuracy. Typical causes of systematic error include observational error, imperfect instrument calibration, and environmental interference. For example: Forgetting to tare or zero a balance produces mass measurements that are always “off” by the same amount.

## What is average rate and instantaneous rate?

The average rate is the change in concentration over a selected period of time. It depends on when you take the measurements. The instantaneous rate is the rate at a particular time. It is determined by finding the slope of the tangent to the concentration vs time curve at that time.

## Can pipette measure gas?

Measurement of volumes of liquids in comparison is simpler as a liquid can be measured using a graduated cylinder, a volumetric flask, burette, pipette or a graduated vial. Volume of gas reported without specifying both these parameters carries no meaning.

## How do you start an introduction for a lab report?

You should start the introduction by talking about what enzymes are and how they work. Next, narrow down the introduction to talk more specifically about the topic you are investigating, and why the study you did was so important.

## Are lab reports hard?

Writing a lab report can seem like a daunting task. It might seem like it could possibly take even longer than the lab procedures themselves. Lab reports are pretty basic; they are part of any course that involves laboratory work and will typically contribute a large percentage to your grade….

## How do you do a 7 minute presentation?

Here’s how to do it.

1. Before you start: Prepare. The first step is to decide how you will make sure the talk fits into seven minutes.
2. Minute one: Get their attention.
3. Minute two: Summarize the topic or idea in exactly 60 seconds.
4. Minute three through six: Give them the meat.
5. Minute seven: Summarize it again.

## How do you write a good introduction for a lab report?

Sometimes an introduction may contain background information, briefly summarize how the experiment was performed, state the findings of the experiment, and list the conclusions of the investigation. Even if you don’t write a whole introduction, you need to state the purpose of the experiment, or why you did it….

## How many pages is a 10 minute talk?

Given the normal speed of speech, you should consider a 10-minute talk the same as a 1500-word paper. Rule of thumb for the number of slides is 10 slides for 10 minutes, and many speakers will vary between 20 to 30 seconds or a minute per slide….

20 slides

## Can you write a 5 page paper in 2 hours?

You Can Write a Five Page Essay in 1 Hour. If you’re panicking over a deadline, take hope in this: it’s possible to write a five page essay in an hour. It’s not, obviously, going to be your best work, but it can be a very passable paper so long as you follow this guide.

## Is a 10 minute presentation long?

Ten minutes is more than enough time in which to give a compelling and effective presentation. A lot of detailed information can be presented in ten minutes without the presentation dragging on and losing the audience’s attention. Structuring the presentation correctly is still vitally important….

## How long does it take to write a report?

So, a 5-page paper might take the average educated person 8–20 hours, or 1–2 days of fairly steady work, if it’s done right. (Note: I’m not talking about academic publishing quality, but “good enough” to turn in for a college course and get a decent grade.)

## Can I write a 10 page paper in a day?

It is certainly quite possible to write a 10 page paper in a day, or even a considerably longer paper in a day. The first step is to GET OFF QUORA and all other social media until you are finished with your project, and avoid all distractions.

## How do you do a 20 minute presentation?

How to prepare a 20-minute TED-like talk

1. A good 20-minute talk presents one idea, tells one story, and asks one question.
2. Begin by choosing one idea. Try to make it an idea that has universal interest, but where your specific expertise can usefully be applied.
3. Next, pick one story to go with the one idea.

## How much is 750 word?

Pages by Word Count

Word Count Pages (single spaced) Font Size
500 Words 1 Page 12 Point
600 Words 1⅓ Page 12 Point
750 Words 1½ Pages 12 Point
800 Words 1⅗ Pages 12 Point

1500 words

## Is it possible to write 1000 words in an hour?

The quickest I’ve ever written a 1,000-word article is one hour. In this case, I already knew the subject matter well and didn’t have to back up every fact in the essay with references….

## How many slides do you need for a 7 minute presentation?

Some experts recommend 1 to 2 slides per minute, or 30 to 60 slides for an hour-long talk. That’s about the average count in corporate presentations—but most of them cram too much information on each slide. If you’ve broken your content down to one idea per slide, you may end up with more than 60 slides.

## How do you write a high school lab report?

Lab Report Template

1. Title: * a brief, concise, yet descriptive title.
2. Introduction: (State the problem or question to be answered)
3. Hypothesis:
4. Materials:
5. Procedure:
6. Data:
7. Conclusions:

## What is the 10 20 30 Rule of PowerPoint?

It’s quite simple: a PowerPoint presentation should have 10 slides, last no more than 20 minutes, and contain no font smaller than 30 points.

25 slides

## How do you write a 7th grade lab report?

Restate the problem question & hypothesis.

1. Restate the independent and dependent variables.
2. Summarize the experimental data.
3. Explain how the hypothesis is either supported or rejected.
4. Possible reason(s) for error.
5. Relate experiment to real world or develop related new questions.

## How long is a 20 minute speech?

Word Count per Speech Length

Speech Length Slow (100 wpm) Fast (160 wpm)
10 minutes 1,000 words 1,600 words
15 minutes 1,500 words 2,400 words
20 minutes 2,000 words 3,200 words
25 minutes 2,500 words 4,000 words

## How many pages is a 30 minute talk?

Word Count per Speech Length

Speech Length Slow (100 wpm) Average (130 wpm)
15 minutes 1,500 words 1,950 words
20 minutes 2,000 words 2,600 words
25 minutes 2,500 words 3,250 words
30 minutes 3,000 words 3,900 words