Consider the titration of 0.050 M HCl with 0.050 M NaOH. Calculate the pH: (a) of the pure HCl solution; (b) of 25.00 mL acid plus 12.50 mL base; (c) at the quivalence point; and (d) of 25.00 mL acid and 37.50 mL base.

Please answer within 1 hour. This is my last question and its due in 1 hour!! :(

What atomic or hybrid orbitals make up the sigma bond between C2 and Cl in dichloroethylene, CH2CCl2? (C2 is the second carbon in the structure as written.) ________ orbital on C2+_________orbital on Cl What is the approximate C1-C2-Cl bond angle?________

Write the net equation for hydrolysis (with states and charges) of the following:

A) NaC2H3O2

B) NH4Cl

C) ZnCl2

D) KAl(SO4)2

(1a) Explain what happens in Oxidation AND Reduction electrochemical reactions.

(1b) What happens to the ions formed in the oxidation reaction?

Give a brief definition of the following terms (a

Titanium metal has a melting point of 1660°C. Use the information below as needed to estimate the boiling point of titanium. HINT: Try writing the boiling process as a simple chemical reaction, and then think about when that reaction would be spontaneous.  

Electromagnetic radiation is emitted when a neutron and proton fuse to make a deuteron. What is the wavelength of this radiation?

The reaction below was performed with 0.342 grams of K2CO3 (molar mass = 138.21 g/mol). After the reaction was complete 0.0675 grams of CO2 was recovered. What was the percent yield to 2 significant figures?

K2CO3(s) --> K2O(s) + CO2(g)

The correct answer is 62 %, but I don't understand how they got there. Please help explain the steps

Answer the following:

1: a) . Breathalyzers determine the alcohol content in a person’s breath by a redox reaction using dichromate ions (the unbalanced reaction is shown below). C2H5OH + Cr2O7 2− → CH3CO2H + Cr3+ a. Determine the number of electrons transferred in this redox reaction. b. Determine the concentration (in M) of Cr3+ in 50.0mL of solution at half the Canadian legal blood alcohol concentration limit (BAC, limit is 0.08 mg/mL).

b) The Keq for the reaction between strontium metal and titanium ions (shown below) is 4.0x1042. Calculate Eo for a strontium-titanium battery. Sr(s) + Ti2+(aq) ⇌ Sr2+(aq) + Ti(s)

How to Write a chemistry Lab report?

I have to write a chemistry lab report, also to presnte it.

The paper should incloud:

- Abstract

- Introduction

- Methods

- Results

- Discussion

- Conclusion

- Confined research

- Citation

Can I have help to describe for me what to write in general in each section of the worlds above (i mean what should write about: is it the equation and describ it? or just write a general info? or in methods just to write the prosses in points or more? and like this )

My Experment about :

System (1):

Investigate the heat lost or gained when a specific or group pf chemicals are added to water.

Sodium Chloride.

I need help to know what to write in the 7 section which the abstract and introducion and all other?

You perform a combustion analysis of 0.255g of a compound that contains C, H and O. You produce 0.561 g of CO₂ and 0.306g of H₂O.

A. How many grams of carbon and hydrogen did you produce?

a)0.154g C & 0.034g H b)0.225g C & 0.068g H c)0.0128g C & 0.017g H d)0.306g C & 0.278g H

B. How many grams of oxygen were there in the original compound?

a)0.081   b)0.091  c)0.055 d)0.067

C. What is the empirical formula of the compound?

a)C2H602 b)C3H8O2   c)C3H8O d)C3H6O

How many grams of oxygen were there in the original compound?

(i) The unbalanced chemical equation for the reaction to form Ag₂[Cr₂O₇] is

Cr³⁺ + S₂O₈^2- +H₂O + AgNO₃ → Ag₂[Cr₂O₇] + SO₄^2- + H⁺ + NO₃^-

Balance the equation and determine which atoms were oxidised and which were reduced in the reaction.

(ii) The unbalanced chemical equation for the reaction to form K₃Cr(O₂)₄ is

K₂CrO₄  + H₂O₂ + KOH → K₃Cr(O₂)₄ + H₂O

Balance the equation. Show which atoms were oxidised and which atoms were reduced.

Which of the following is an empirical formula?

a. C2H6

b. C3H8

c. C4H10

d. C6H6

Please explain!:) Thank you for your help!!!