chem101

20 results

chem101

what is the function of an indicator in a titration

CHEM101

Do you have to know accurately the concentration of NaOH?

chem101

propyl Bromide reacts with Mg, Propanone, H+ to yeild what?

chem101

will the following reaction take place nh3+h2o= nh2 + h3o

chem101

Calculate the H+ ion concentration given the following pH readings: a) 2.00 b) 9.50 c) 10.40 d)-125(is this a reasonable question neee help

chem101

a 0.1M NaOH solution has been prepared for you.Describe how you would prepare 1 litre of the same solution

Chem101

C7H16(l)+O2(g)→ Express your answer as a chemical equation. Identify all of the phases in your answer.

chem101

A 7.2 ´ 10-3 M solution of acetic acid is 5.0% dissociated. In a 7.2 ´ 10-4 M solution, the percentage of dissociation would be Value A. The same. B. >5%. C. <5%. D. zero. E. none of these. pls explain why the answer is B

chem101

Which of the following solutes in aqueous solution would be expected to exhibit the LARGEST freezing-point lowering (assuming ideal behavior)? A. 0.1 m NaCl B. 0.2 m CH3COOH C. 0.1 m MgCl2 D. 0.05 m Al2(SO4)3 E. 0.25 m NH3

chem101

50.0ml of 0.10M HCL{aq} was added to 40.0ml of 0.10M NaOH{aq} and the mixture was stirred,then tested with a pH meter.What reading should be obtained for pH at 25.0degrees celcias?

chem101

if 23.74ml of 0.01470M NaOH are required to completely neutralize 25.00ml of gastric juice,calculate the concentration of the hydrochloric acid[in g/L]in stomach gastric juice

SCIENCE(CHEM101)

iF 23.74Ml OF 0.01470m nAoh are required to completely neutrize 25.00mL of gastric juice,calculate the concentration of the hydrochloric acid(in g/L )in the stomach gastric juice.show steps and calculations

chem101

which of the following compounds have polar bonds and a net dipole moment? a) H3COH b) H3CCOCH3 ALSO PLEASE CHECK THIS, RANK THE FOLLOWING FROM MOST TO LEAST ACIDIC COMPOUND: A)H2SO4>H3CCO2H>H20 B)H3CCH2NH2>H3CCH2OH>H3CCO2H

chem101

Processed cheese must be at a pH of 5.5 to 5.9 to prevent growth of unwanted microorganisms. If a sample comes back with [OH-]of 7.76e-9 as a control supervisor would you send the cheese back? Justify your answer. My asnswer is no but I don't know how to justify it by showing ...

chem101

Processed cheese must be at a pH of 5.5 to 5.9 to prevent growth of unwanted microorganisms. If a sample comes back with [OH-]of 7.76e-9 as a control supervisor would you send the cheese back? Justify your answer. My asnswer is no but I don't know how to justify it by showing ...

chem101

Hydrogen gas can be produced in the lab by the reaction of magnesium metal and hydrochloric acid. Mg + 2 HC -> MgCl2 + H2 How many grams of hydrogen gas will be produce if 5.00 g of magnesium metal is dissolved in excess acid.

chem101

If a solution contains 0.0100 mole of HCl in 10.0 mL aqueous solution. a.) What is its molarity? My answer is 1M (0.0100 mole/10.0 mL * 1000 mL/1L = 1M) b.) What is H^+ ion concentration for this solution? c.) What is the expected pH for this solution? pls help i don't know ...

General Chemistry (Chem101)

A chemist mixes two liquids A and B to form a homogeneous mixture. The densities of the liquids are 2.0514 g/mL for A and 2.6678 g/mL for B. When she drops a small object into the mixture, she finds that the object becomes suspended in the liquid; that is, it neither sinks nor...

chem101

The equilibrium under investigation is : H2CO3(aq) * H2O(l) + CO2(g) How does the pulling and pushing of the plunger affects the equilibrium? Is it consistent with LeChatelier's principle? my answer is that if you push you increase the pressure volume decrease and the ...

chem101

Endothermic reaction equilibrium: BiCl3(aq) + H2O(g) = BiOCl(s) +2HCL(aq) + 2 HCl at a point at which the sollution is colorless and a small minute amoount of BiOCl(s) is observed. for the folowing questions 1to 5: a. state which way the reaction shift in terms of LeChateliers...

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