294 Answered Questions for the topic Chemistry Lab

Chemistry Lab

05/11/18

When 200. mL of water are added to 100. mL of 12% KCl solution the final concentration of KCl is?

Assume the volumes add.
Chemistry Lab Titration

05/09/18

Titration question.

This is the full question    Samples of hydrochloric acid, of unknown concentration, were titrated with a solution of sodium carbonate. The flasks were rinsed with sodium carbonated stock... more
Chemistry Lab How To Solve The Problem

05/03/18

a 250ml, 3 M solution of silver acetate is concentrated to a 12 M solution, what is the new volume?

a 250 ml,3 M solution of silver acetate is concentrated to a 12 M solution , what is the new volume
Chemistry Lab How To Solve The Problem

05/03/18

a 250ml, 3 M solution of silver acetate is concentrated to a 12 M solution, what is the new volume?

A 250 mL, 3 M solution of silver acetate is concentrated to a 12 M solution, what is the new volume? 
Chemistry Lab

05/01/18

Balance this equation. _Pb(NO3)2+_HCl

Balnace the equation
Chemistry Lab

04/24/18

My question is in the description

A titration is done using 0.10 M NaOH in the buret and 15.0 mL of 0.18 M HCl in the Erlenmeyer Flask. How many moles of HCl are left in the flask after a total of 5.0 mL of the 0.10 M NaOH solution... more
Chemistry Lab

04/17/18

If the concentration of glucose is increased from 0.1 M to 2.0 M, will the conductance change?

If the concentration of glucose is increased from 0.1 M to 2.0 M, will the conductance change?

04/15/18

What causes vitamin C concentration to increase in freshly squeezed orange juice?

Hi. In year 13 Chemistry we titrated an iodine solution with freshly squeezed orange juice which had been stored at different temperatures. We keep the orange juice solution in an incubator to... more

04/11/18

how does impurities affect filtration and drying of aspirin

I need help with this question

04/11/18

describe the factors that influence purity in filtration and drying.

I need help with this question.
Chemistry Lab

04/10/18

Chemistry Lab - Molality of a Solution

Hello,   I am finishing up my chemistry lab,  and am having trouble solving a question.  I clearly am missing something here, but I cannot figure out what it is.   The question... more

04/10/18

how does the lattice structure cause impurities?

I need help
Chemistry Lab

04/08/18

if no sugar was removed at any time, why did the molarity of the 2L solution change compared to the 1L solution

use the words solute and solvent in your answer 
Chemistry Lab

04/04/18

Chemistry lab help, Simulating an air bag with HCl and Baking Soda.

I have a .946L ziplock bag. I have to combine the proper amount of HCl and NaHCO3 in the bag for a lab to fill the bag enough so that it is plump but will not pop. The temperature of the room will... more

Its a multiple choice I have C,D,F,G right now a classmate has C,D,E....help ? PLEASE RESPOND QUICKLY

A 35g piece of  copper is warmed 45 to 55 C and placed in beaker (A) containing 100ml of alchohol at 25C. A 3tg sample of liquid water is warmed from 45 to 55C and placed in a second beaker (b)... more
Chemistry Lab Science Chemistry

03/28/18

explain how the yield, purity and atom economy of the substances prepared may be affected by changes to the methods used

I need help with this experiment how do I relate this to ethyl ethanoate and aspirin experiment 
Chemistry Lab

03/26/18

Chemistry magnesium reaction with HCI

0.0367g of magnesium to produce hydrogen gas collected over water at 24°C and 746mmHg atmospheric pressure. volume of the collected gas was 46.3mL, what is the value of the gas constant, R?Percent... more

03/20/18

Mass of Aspirin in a tablet

In a lab determining the mass of acetylsalicylic acid in an aspirin tablet, I'm having trouble with the dilution part of my calculation.   An unknown solution was made by placing an aspirin... more
Chemistry Lab

03/16/18

I need help with five chemistry questions

I need help with 5 chemistry questions and would need work to be shown. A. Measure out 0.130 moles of salt (NaCl) into a blue, dry cup. You need to convert to mass in grams. Show work:B. Put... more
Chemistry Lab

03/15/18

Measure out 0.210 moles of salt (NaCl) into a blue dry cup, you need to convert to mass in grams. Show work:

I need work to be shown. I would also need help with these two questions. Put 2.85x10^23 molecules of water into a clear cup. You need to convert to mass in grams. Show work:
Chemistry Lab

03/12/18

How is it possiable that a reaction can be both synthesis and redox

Chemsidbsjs. When’s d SJSU’s s shsndd

03/05/18

How do I use the ideal gas relationship to determine the experimental volume of CO2 at STP?

Average volume of CO2 in the experiment was 37.68mL. water temp 20.08 C vapour pressure of water 17.7 mmHg Barometric pressure 758.3mmHg   P1V1/T1  = P2V2/T2   I know I have to rearrange the... more
Chemistry Lab

03/01/18

Total amount of moles in water in a beaker

Chemistry assignment 

Relative error to absolute error?

I'm asked to use the relative error to find the absolute error of [Na2S2O3]I've calculated these amounts in previous questions:[Na2S2O3] = 0.01001MRelative error: 0.3%is there other information I... more

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.