Introductory Courses

Writing a laboratory report (Detailed Explanation)

Writing a laboratory report (Detailed Explanation)

This is a great tutorial on how to write a lab report if you're just starting off in your studies...

See attachment

Bio_man

bio_man   5642   1 Reply

finndog32

Your teacher used concentrated HCL to prepare the solutions for this lab?

Your teacher used concentrated HCL to prepare the solutions for this lab?

Your teacher used concentrated HCL to prepare the solutions for this lab.
(i) Concentrated HCl has a density of 1.19 g/cm3 and is 38% HCl by mass. Calculate the molarity of concentrated HCl.
(ii) Describe the procedure to prepare 500. mL of 2M HCl fr

smileylady   365   1 Reply

darkwoo

You work in a DNA processing laboratory, and need to analyze a sperm sample from a sexual assault case that in?

You work in a DNA processing laboratory, and need to analyze a sperm sample from a sexual assault case that in?

You work in a DNA processing laboratory, and need to analyze a sperm sample from a sexual assault case that involved multiple male attackers. Which of the following type of DNA analysis would you choose for this particular case?

a) RFLP
b)Y-marker a

budsworth   394   1 Reply

datoledo88

You take out 0.1 ml of 1:100 dilution and put it on an agar plate. What dilution of mud is this?

You take out 0.1 ml of 1:100 dilution and put it on an agar plate. What dilution of mud is this?

You take out 0.1 ml of 1:1000 dilution and put it on an agar plate. What dilution of mud is this?
Given: 1 ml was added to 999 ml water = 1:1000 dilution

fey   343   1 Reply

ikilledpablo1

You are studying a population of a 100 people and discover that 36 of these people are ss for a genetic?

You are studying a population of a 100 people and discover that 36 of these people are ss for a genetic?

condition. use the hardy-weinberg equation to figure out the frequencies of the S and s alleles.What are the frequencies of the SS,Ss and ss genotypes?

dattallmofo_   4767   2 Replies

mickey27121

Yeast Molasses Growth Lab Unexpected Results?

Yeast Molasses Growth Lab Unexpected Results?

In my biology class we ran a lab concerned with determining if adding more food (in the form of molasses) to a yeast colony would cause it to increase in size. The logical answer is yes and that was our hypothesis. This belief also continued to hold

oblinger   560   1 Reply

TerryFish

Yeast fermentation lab report

Yeast fermentation lab report

Does anyone know where I can get lab report help?  I have 2 reports due on Friday and no clue how to get them done.  Any advice would be greatly appreciated!

BioQueen   2158   6 Replies

sharper7

wrtiting a hypothesis

wrtiting a hypothesis

heyy! I am doing a science lab report and my problem is this:
1.   Are corn seeds of type I (no treatment) and type II (heat treatment) viable?
2.   Does the heat exposure affect corn seed viability?

is this hypothesis a good one?

myribaumann   1900   2 Replies

sarah!

writing abstract for lab report - do you include the results?

writing abstract for lab report - do you include the results?

i'm writing in abstract for lab report. you basically add a sentence or two from introduction, methods and results and discussion? doesnt that spoil the results? do you give them away or not? thanks

tommytoughnut   712   2 Replies

terrokar

Writing a lab report

Writing a lab report

Hi
 I'm starting University in September , and I was just wondering are there any trusted web sites that write lab reports for every student needs in science for a reasonable fee?
I found a lot of fliers on campus offering this type of

Rockangel   1064   1 Reply

savio

would elimination of all laboratory stocks really be the extinction of the smallpox virus?

would elimination of all laboratory stocks really be the extinction of the smallpox virus?

The United States and Russia have repeatedly agreed to destroy their stocks of the smallpox virus, but the deadline for destruction has been postponed numerous times. In the meantime, the entire genome of variola major has been sequenced. What reason

Datkidjoven   444   2 Replies

Michael_VV

Will there be a change in growth if E-coli is grown on an agar deposit that is near another agar deposit?

Will there be a change in growth if E-coli is grown on an agar deposit that is near another agar deposit?

This is a growth experiment on a petri dish. Bacteria is innoculated on agar on one-half of the plate, but not on the other. Will this alter growth? Can the bacteria, say, sense this agar and somehow migrate and grow on the other agar?

MicroGirl   887   1 Reply

microbio24

Will the neutralization buffer from a mini prep kit go bad if not stored at 4C?

Will the neutralization buffer from a mini prep kit go bad if not stored at 4C?

I bought a new mini prep kit but forgot to put the neutralization buffer at 4C until 2 weeks after the kit got here.  Is it still ok?  Will the RNase still work?

BUGG123   673   1 Reply

irina

Will the absorbance of the resulting solution be higher than, lower than or the same as it would be if the mar?

Will the absorbance of the resulting solution be higher than, lower than or the same as it would be if the mar?

In the final step of preparing the iron sample from the vitamin tablet, a student overshot the mark on the volumetric flask when diluting with DI water. Will the absorbance of the resulting solution be higher than, lower than or the same as it would

nutrition   794   1 Reply

smj545

Will putting ovalbumin (egg white) on an Elodea leaf have any affect?

Will putting ovalbumin (egg white) on an Elodea leaf have any affect?

I'm a junior in AP Biology and am currently doing an analysis of the experiment where we took an Elodea leaf and looked at it under a microscope. We then placed a few drops of egg white on the leaf under the coverslip and looked at it under the micro

mickey16   524   1 Reply

SMOKEY2112

Will heroin effect your lab results?

Will heroin effect your lab results?

my friend did heroin today and has to have his blood drawn tomorow will his results be effected by the heroin

teo123   717   4 Replies

davidamoya

Why would the absorbance decrease if the wavelength increases?

Why would the absorbance decrease if the wavelength increases?

I mean what makes the absorbance lower? why is the higher wavelength letting less light through?

micko0317   7153   2 Replies

lmpauling

Why would molar conductivity increase in dilution?

Why would molar conductivity increase in dilution?

For strong electrolytes solution like HCl, and NaCl.
The molar conductivity of the solution is increase when the concentration of solution decrease. Why?
Not suppose to be dilution decreases the molar conductivity?

Professional please answer my ques

feyi44   260   1 Reply

tomtom1234

Why the universal indicator called universal?

Why the universal indicator called universal?

I did a serial dilution lab about pH and need to explain that. ._.

dataplease   880   1 Reply

SmokeyV4L

why should there be no open flames in the laboratory during a molar mass butane lab?

why should there be no open flames in the laboratory during a molar mass butane lab?

2. why should there be no open flames in the laboratory during this experiment
3. For the purpose of this lab, explain why it is important that the butane is relatively insoluble in water

datheman   1023   1 Reply

dataplease

Why should the funnel be removed from the top of the burette while a titration is being performed?

Why should the funnel be removed from the top of the burette while a titration is being performed?

also.. why dont erlenmeyer flasks have to be dry?

ldelovio   640   1 Reply

ASJ

Why is water not weighed on an analytical balance?

Why is water not weighed on an analytical balance?

We did a lab testing the relationship between volume and amount of gas

We placed lab gas into a 50 mL erlenmeyer flask and weighed it 3 times on an ANALYTICAL balance. We then filled the flask with water to the point at which the stopper had been in

bufi   568   4 Replies

ask4help

why is the liver called the chemical laboratory?

why is the liver called the chemical laboratory?

I know that the liver does loads of stuff but what exactly about it makes it a chemical laboratory.

Juisce13   1279   1 Reply

michdem

Why is the fluorescence spectrum at a longer wavelength than the absorbance spectrum?

Why is the fluorescence spectrum at a longer wavelength than the absorbance spectrum?

This is about the fluorescence spectrophotometer. Please help!

smmoh4   573   1 Reply

florida93

Why is the charging time different for various light sources in a photoelectric experiment?

Why is the charging time different for various light sources in a photoelectric experiment?

I have noticed that during a photo electric experiment using a electronic h/e device, that the charge time(time to reach stopping potential) for yellow light (lower frequency) takes longer than green light (higher frequency). Is this simply due to th

Firedancer51   303   1 Reply

Smoren

Why is the amount of water irrelevant in a strong acid strong base titration?

Why is the amount of water irrelevant in a strong acid strong base titration?

I did a titration lab with a strong acid (HCl) and a strong base (NaOH), and we had to find the molarity of the HCl. My teacher is asking for the conclusion about why the amount of water in the beginning of the lab was irrelevant to the molarity?

leeleez   487   1 Reply

Leendr

why is starch the only food type broken down by Amylase in the mouth?

why is starch the only food type broken down by Amylase in the mouth?

Why aren't things like proteins broken down with amylase in the mouth?

SMK.ANOOP   580   2 Replies

smmoh4

why is soap salt and water a good extraction buffer for DNA?

why is soap salt and water a good extraction buffer for DNA?

I did a lab activity for my forensics class and we extracted DNA from a strawberry using an extraction buffer of Soap, Salt, and water. Why would we use this?

buhneeduh1218   499   1 Reply

Bugmenot

Why is Omega -3 is called as such?

Why is Omega -3 is called as such?

why is Omega-3 is called as such?

legaspis   424   3 Replies

Tjones5

Why is it recommended that KHP be dried in an oven prior to use in a standardization process (for titration)?

Why is it recommended that KHP be dried in an oven prior to use in a standardization process (for titration)?

If a sample of KHP did contain some water, what are the consequences of this on the calculation of the concentration of NaOH and molar mass of the unknown acid in the experiment? I need help answering this question for my chem AP titration lab.

nurav   516   1 Reply

Rima5879

Why is it necessary to use Cold Reagents in DNA extraction? How can you confirm something extracted is DNA?

Why is it necessary to use Cold Reagents in DNA extraction? How can you confirm something extracted is DNA?

We extracted DNA from a Pea by blending it, then mixing the resulting mushy thing with pineapple juice and alcohol. Some mucus-like substance floated. How can I confirm it is DNA? Also, why use cold pineapple juice?

rikantank   427   3 Replies

jtong

why is it necessary to have a serial dilution in an ELISA?

why is it necessary to have a serial dilution in an ELISA?

In ELISA you have to create a serial dilution of the antibody before putting in the wells, why do you have to do that?

Nursing01   290   1 Reply

nursing 2012

why is it necessary to expose the HeLa cells to a hypotonic solution when preparing cells for karyotyping?

why is it necessary to expose the HeLa cells to a hypotonic solution when preparing cells for karyotyping?

why is it necessary to expose the HeLa cells to a hypotonic solution when preparing cells for karyotyping?

daTALLsmurf2   2535   1 Reply

Mickie515

Why is it important to use the correct dilutions of medicines? (More questions too)?

Why is it important to use the correct dilutions of medicines? (More questions too)?

Why is it important to use the correct dilutions of medicines?
Why (and how) does dosage vary with age?
What problems might arise if a dose is too low, or too high?
Thanks in advance, I can't find this information anywhere!

o.avworo   281   2 Replies

Ikkou

why is it better to use serial dilutions?

why is it better to use serial dilutions?

I know what serial dilutions are and how to do them but why is it better to use serial dilutions when making up chemical solutions of low concentration e.g. 0.01M rather than just making it up in one go?

Nurealicious   416   1 Reply

iki08

Why in carbohydrate digestion lab activity would you test a substrate for Starch & Sugar?

Why in carbohydrate digestion lab activity would you test a substrate for Starch & Sugar?

I'm sorry if this doesn't make sense but I really need some help on this.  In my A&P lab im having to answer questions on a carbohydrate digestion test tube test.  Why in carbohydrate digestion lab activity would you test a su

deannad17   820   1 Reply

padre

Why does the experiment using a lemon to power a small light bulb work ?

Why does the experiment using a lemon to power a small light bulb work ?

Can someone explain how the lemon lights up the light bulb ? What role does the copper wire and pennies play ? And any suggestions for making this experiment a success for kids ? My daughter is trying to find more detailed info and hasn't had much lu

riyadamin   356   2 Replies

rivetcolin

why does the blank have an absorbance reading above zero? Bradford protein assa

why does the blank have an absorbance reading above zero? Bradford protein assa

Why is it necessary to substract this absorbance from all other results?

kondzia   2469   4 Replies

habiba

Why does my uv-vis spectrophotometer give negative absorbance?

Why does my uv-vis spectrophotometer give negative absorbance?

In phosphorus determination I use a spec. The thermo evolution 160. It has a carousel and at the 6,7,1 and 2 positions only, negative values are obtained. I cleaned the cuvettes, redid blanks and did it over. Same results. This occurs only on some da

mickeylee   7492   2 Replies

buffyoumofo

Why does dilution of ethanol lower its mass?

Why does dilution of ethanol lower its mass?

My chemistry teacher diluted .3 mL of ethanol with water but she used too many drops, stupid ik lol. So when we heated the liquid to find the molecular mass the mass was way to low. She wants us to find out for ourselves why this excessive dilution l

nurhan   252   1 Reply

rimazx