# chemistry

Hi! i'm kinda having trouble getting this.. Don't understand it really

from

Ca(OH)2 + 2HCl-----> CaCl2 + 2H2O

How do i calculate Ca+?

1) do you mean the concentration of Ca+ ion?
2) is there excess HCl? What is given?

ok

It was from a titration/ stoichiometry lab i did

it was between 0.05 mol/dm^3 HCl and saturated Ca(OH)2

The Ca(0H)2 volumes used were

23.39, 22.49 and 20.78

What was the volume of the HCl?

How did you "titrate". At what point did the "titration" end?

the volume of the HCL was 20cm^3

the HCL was titrated against the Ca(OH)2.. we were determining the solubilty product of Ca(OH)2.

WE did the experiment 3 times
and these were the readings for the volumes of the Ca(OH)2 used

23.39, 22.49, 20.78

Ok. You know the moles of HCl used (concentration x volume) watch units.
There fore, the balanced equation tells you how many moles of Ca(OH)2 were used, so the concentration of the Ca+ ion is that number of moles /volume of total water solution (acid solution and acid solution)

check my thinking, I am not certain of your setup and procedure.

1. 👍 0
2. 👎 0
3. 👁 145

## Similar Questions

1. ### Chemistry

How mush CaCl2, in grams, is needed to make 2.0 L of a 3.5M solution? g CaCl2 = (2.0L) *( 3.5 mol Cl-/1L) * (1mol CaCl2/ 2mol Cl-) *( 110.98 g CaCl2/ 1 mol CaCl2) = 5.549 g CaCl2 i don't think i did any of this right

asked by Sydney on June 23, 2015
2. ### science

If 20g of Ca(0H)2 took part in the following reaction, how much CaCl2 would be formed. Ca(0H)2 + 2HCl to CaCl2 +2H20

asked by tracey on January 2, 2012
3. ### Chemistry

Are these reactions correct? I was told to do them in "reaction de deplacement simple", or simple moving reaction, I think. 1. Mg + 2HCl = H2 + MgCl2 2. Li + HCl = H2 + LiCl 3. Fe + 2HCl = H2 + FeCl2 4. Zn + 2HCl = H2 + ZnCl2 5.

asked by Holly on October 2, 2008
4. ### Chemistry

For the reaction CaCO3(s)+ 2HCl(aq)= CaCl2(aq)+ CO2(g)+ H2O(l) how many grams of CaCl2 can be obtained if 14.6 g HCl is allowed in CaCO3?

asked by Lita on November 24, 2014
5. ### chem hwk help!

Given the following reaction: 3 CaCl2 + 2 H3PO4 Ca3(PO4)2 + 6 HCl How many grams of H3PO4 are needed to react completely with 1.837 g of CaCl2? I don't understand at all

asked by Annie on January 25, 2013
6. ### Chemistry

which equation represents an oxidation-reduction reaction? 1.HCl+KOH-->KCl+H2O 2.4HCl+MnO2-->MnCl2+2H2O+Cl2 3.2HCl+CaCO3-->CaCl2+H2O+CO2 4.2HCl+FeS-->FeCl2+H2S

asked by Alexis on March 20, 2011
7. ### chemistry

2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaCl how many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used? When amounts of both materials are listed one must worry about which is the limiting reagentalthough the

asked by Hawk on June 21, 2006
8. ### chemistry

If 2.1 moles of CaCl2 are dissolved in enough water to make a 0.92-liter solution, what is the resulting molarity? 0.44 M CaCl2 0.70 M CaCl2 2.3 M CaCl2 3.0 M CaCl2

asked by smith on November 7, 2010
9. ### Math

tell whether the given ordered pair is a solution of the equation y=9-2x;(-2,5) Help i kinda don't understand