112 Answered Questions for the topic Chemical reactions

09/16/17

Hydrogen Bonding
Of these substances in the pure liquid phase which one exhibits hydrogen bonding? a) CHF3 b)CH3-O-CH3 c)H2SO4 d)all of these I'm not sure why its only H2SO4
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09/05/17

multiple choice HCL + carbonate/nitrate question
31 A mixture of solids is treated with an excess of dilute hydrochloric acid. A colourless gas is evolved and a white precipitate forms. What are the solids in the mixture?   A calcium carbonate... more
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08/09/17

Sodium benzoate in carbonated beverages
Sodium benzoate is a common food preservative and can be commonly found in the ingredient list of carbonated beverages. Carbonated beverages also contain phosphoric acid and are highly acidic.... more
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08/09/17

Write a balanced equation
What would be the balanced equation for the synthesis of benzoic acid using the Gignard reagent, phenylmagnesium bromide? 
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Chemical Reactions Science Chemistry Physics

07/21/17

Solve chemical reaction for temperature of exothermic reaction (thermite)
Hi there, I I have a question about Physics/ chemistry.If I have a bag of iron oxide(lll) and powdered aluminium in the ratio of 3:1 totalling 72g, with 54g being Fe2O3 and 18g of 2Al, what would... more
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Chemical Reactions

05/04/17

Concentrations of Iron II Sulfate
There are 2 solutions of Iron II Sulfate, both being of different concentratons. The solutions are labeled B and C. 25cm3 of B is poured into testtube labeled B and 25cm3 of C is poured into... more
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Chemical Reactions

04/30/17

which substance experiences the greatest surface tension? Hexane, ethylene, pentanol, or ammonia
Thanks! I appreciate whoever is going to answer this question! I do not know what else to put because there really is no desciption its just a question! 
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Chemical Reactions Science Chemistry

04/02/17

Double Displacment
In a double displacement reaction, do the metals leave their original non-metal to find the other non-metal, or vice versa?
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03/15/17

Distilled water with different synthetic dissolved salt in it.
HelloI have a liquid mixture in a bottle containing different synthetic substances dissolved from their salt forms (i.e. lidocaine hydrochloride, anhydrous caffeine). These compounds are dissolved... more
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Chemical Reactions Chemistry Titrations Chemistry Lab

03/09/17

Chemistry Titration
What is the molarity of NaOCl in a solution of bleach if 10.00mL requires 22.35mL of 0.02191M Na2S2O3 to reach the endpoint? Show work. Hint: Work through the I2 first.   Reaction Equations that... more
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02/11/17

Synthesis of Physostigmine
I am trying to break down the synthesis of Physostigmine. In steps 9 and 10 in this synthesis picture https://en.wikipedia.org/wiki/Physostigmine#/media/File:Julian_synthesis.gif, how is the Et... more
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Chemical Reactions

11/09/16

rate of reaction
2A + B → C + D The rate of disappearance of A in the reaction above is - d[A]/dt = K[A][B]2 What happens to the rate of appearance of C if the concentration of A is doubled and that of B is tripled? more
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Chemical Reactions Chemistry Solutions Chemical Change

10/19/16

Solutions...?
What would you expect to see in a beaker containing a solution of the weak electrolyte acetic acid (CH3COOH), and in a separate beaker containing a solution of the strong electrolyte Potassium... more
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10/06/16

If salt and citric acid are mixed, is it a physical or chemical change?
What about between: Salt and NaOH (Sodium Hydroxide) Potassium Chloride and Distilled Water Potassium Chloride and Citric Acid Potassium Chloride and Vegetable Oil Potassium Chloride and... more
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Chemical Reactions Chemistry Kinematics

09/23/16

Chemical Kinetics (Energy released)
in which case energy released is min:- a)cl to cl- b)p to p- c) n to n- d) c to c- method used in finding it is?
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Chemical Reactions Chemistry Equilibrium Reactions

09/22/16

Why doesn't NaCl and HCl have the same effect on an equilibrium reaction
Recently in my AP Chem class we did a simple reaction demonstrating equilibrium: [Co(H2O)6]2+(aq)(pink) + 4Cl-(aq) <--> [CoCl4]2-(aq)(blue) + 6H2O(l) (in an ethanol solution). The reaction... more
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Chemical Reactions

05/29/16

Would the reaction between H2SO4 and NH4OH give off heat?
I have a mystery solution lab in Chemistry and I was wondering if H2SO4 and NH4OH give off heat? Or maybe there is a precipitate or color change? Thanks
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Chemical Reactions

05/01/16

K(s)+h2o(I) yield k2o(aq)+h2(g)+heat
State the type of chemical reaction write a word problem for the chemical reaction    
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Chemical Reactions Chemistry Moles Stoichiometry

04/07/16

How many moles of iron are needed to form 8 moles of iron lll oxide? With 4 Fe + 3 O2 = 2 Fe2O3
 i really just don't understand how to do these problems :/
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Chemical Reactions Chemistry Reactions

04/05/16

General Chemistry Reactant question
I have no idea how to do the following problem...   "If you wish to prepare 2.00 g of BaSO4 (233.43 g/mol) from 1.5 M Na2SO4 (142.04 g/mol) and 1.0 M BaCl2 (208.23 g/mol) how many milliliters... more
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Chemical Reactions Chemistry

03/17/16

chemistry help!!
Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6 Cl2(g) → 4 PCl3(g) . A sample of PCl3 of mass 298.2 g was collected from the reaction... more
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02/08/16

reaction of amines at equations
Write a skeletal equation for the reaction of phenylamine with sodium nitrate (III) in water, and then show how this diazonium salt reacts with the naphan-2-ol ion in a coupling reaction.
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02/08/16

Reaction of amines
Describe the  reaction of phenyl amine with ethanoyl chloride.
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02/08/16

Amines and it's strengths
Comment on the relative base strengths of the different nitrogen containing compounds. Can you explain why phenyl amine has a lower base strength than the other compounds? (Define a base; this... more
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02/08/16

the reactions of amines and it's solubility
How does the solubility in water differ for the nitrogen containing compounds? Suggest reasons for this.What would you expect the solubility in non-aqueous solvents to be? Does your answer to this... more
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