Chemistry - March 2007

Calculate the solubility of each of the following compounds in moles per liter. Ignore any acid-base properties.

(a) Ag3PO4, Ksp = 1.8 10-18

(b) CaCO3, Ksp = 8.7 10-9

(c) Hg2Cl2, Ksp = 1.1 10-18 (Hg22+ is the cation in solution.)

2007-03-06 03:11:27 · 1 answers · asked by trypanophobic34 2

Calculate the pH of a solution formed by mixing 152.0 mL of 0.100 M NaF and 209.0 mL of 0.025 M HCl.

2007-03-06 03:10:13 · 1 answers · asked by trypanophobic34 2

What volumes of 0.41 M HNO2 and 0.57 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.64?

2007-03-06 03:09:26 · 1 answers · asked by trypanophobic34 2

Thanks.

2007-03-06 03:07:54 · 3 answers · asked by Anonymous

pl help by 2day

2007-03-06 03:00:03 · 1 answers · asked by sneha 1

Calculate the molarity of the HCl solution, the [H3O+], and the pH. For a strong acid such as HCl, the [H3O+] is the same as the molarity of the HCl solution.
HCl + H2O------ H3O+ + Cl-

How to solve this problem. I don't get it.

2007-03-06 02:52:50 · 3 answers · asked by shortydidi03 2

2007-03-06 02:46:59 · 3 answers · asked by kellie_city 1

2007-03-06 02:34:20 · 5 answers · asked by kellie_city 1

2007-03-06 02:18:47 · 3 answers · asked by shortydidi03 2

The lattice energy of CsI(s) is −604 KJ/mol, and the enthalpy of solution is 33 KJ/mol. Calculate the enthalpy of hydration (KJ) of 1.030 moles of CsI.

2007-03-06 02:13:17 · 3 answers · asked by Yessica 1

2,4g of Carbon
0,3g of hydrogen
4,8g of oxygen

use the informaiton aboveto show that this substance onlyu contains these three elements.

can you write the equation!!

thanks

2007-03-06 02:03:28 · 1 answers · asked by aly 1

2007-03-06 01:42:03 · 1 answers · asked by lildude_shubham 1

2007-03-06 01:26:21 · 6 answers · asked by tlh1063 1

The dissociation of molecular iodine atoms is represented as

I2 (g) > 2I (g)

At 1000 K, the equilibrium constant Kc for the reaction is 3.80 x 10 (raised to -5). Suppose you start with 0.0456 mole of I2 in 2.30 L flask at 1000 K. What are the concentrations of the gases at equilibirum?


THANK YOU!

2007-03-06 01:07:18 · 1 answers · asked by -three31one- 1

I need help with this physics homework on Millikan's oil drop. can anyone help?



Discuss the method used by Millikan to determine the smallest unit of charge. Remember to include the equipment used, the care taken, the method of data collection, the interpretation of the data collected, and the conclusions Millikan formed from the data.


Explain what is meant by fundamental unit of charge.


If you are given many closed sacks filled with different amounts of identical marbles, how could you determine the weight of a single marble without opening the sacks? (Assume the weight of the sack material can be ignored.)

2007-03-06 01:02:23 · 1 answers · asked by mac_addict 3

just a short answer wil do

2007-03-06 00:58:44 · 3 answers · asked by zerophilmister 2

a small cylinder of helium gas used for filling balloons has a volume of 2.30 L and a pressure of 13,800 kPa at 25 degrees C. How many balloons can you fill if each one has a volume of 1.5 L and a pressure of 1.25 atm at 25 degrees C?

2007-03-06 00:55:37 · 1 answers · asked by justcallmepre 2

1. HBr
2. NaH
3. H2SO4
4. Na2Cr2O7

2007-03-06 00:31:26 · 4 answers · asked by Anonymous

Predict the products of the following:

CH3CH=CH2 + BR2 -->

CH3CH2CH2CH2CH2Cl --> (with NaOH and heat) -->

CH3CH2CH2CH2CH2Cl --> (with NaOH, ethanol, heat) -->

benzene ring + HNO3 --> (with concentration H2SO4 and heat) -->

please help. I keep reading and reading a level OC books but i don't understand it one iota :(

2007-03-06 00:13:18 · 2 answers · asked by Anonymous

At 1000 K, a sample of pure NO2 gas decomposes:

2NO2 (g) > 2NO (g) + O2 (g)

The equilibrium constant Kp is 158. Analysis shows that the partial pressure of O2 is 0.25 atm at equilibrium. Calculate the pressure of NO and NO2 in the mixture.


THANK YOU VERY MUCH!

2007-03-05 23:28:15 · 3 answers · asked by -three31one- 1

Say if water is a strong ligand ?

2007-03-05 23:21:28 · 3 answers · asked by Anonymous

2007-03-05 23:14:22 · 5 answers · asked by Nicole J 1

Explain why Bromine, Br2, a liquid at room temperature has a higher boiling point than chlorine gas?

2007-03-05 23:12:22 · 3 answers · asked by juliawilde 1

CF4 has polar bonds but yet why is it a non-polar molecule overall?

2007-03-05 23:11:11 · 3 answers · asked by juliawilde 1

Consider the factors affecting the boiling points of NH3 and PH3, which has the higher boiling point and why?

2007-03-05 21:50:46 · 2 answers · asked by Anonymous

Why is the melting point of MgO much higher than that of NaCl even though they're both ionic?

2007-03-05 21:32:18 · 1 answers · asked by Anonymous

sweet food (eg. cake, chocolate etc.) as an antidote to what kind of POISON?
Question Details: i need this for my research help me. thanks

2007-03-05 21:23:16 · 2 answers · asked by Anonymous

like turn off the gas after you cook , do not shake the firework..........plz thanx

2007-03-05 21:22:10 · 2 answers · asked by Anonymous

2007-03-05 21:18:15 · 9 answers · asked by www_nikhil 1

why does a firework go off or explode? when you shake it

2007-03-05 21:10:22 · 2 answers · asked by Anonymous