Chemistry, 10.03.2021 14:00, dzepeda061
14. As a solution containing 158 g dm of Nas,
dm
B was obtained by dissolving 9.0 g of an impure sample of lain aqueous KI and the solution made up to
Put A into the burete. Pipette 25.0 cm of B. Use starch solution as indicator Repeat the titration to obtain
concordant titre values
Complete the table and calculate the average volume of Aused
Buretle readings/em!
1
2
Final reading
14.30
28.50
6.55
Initial reading
0.00
Volume of A used/em!
14.00
14.10
The equation for the reaction involved in the titration is:
T25.01.21 S. O.
From your results and information provided, calculate the:
a) Concentration of A in moldm?
b) Concentration of 12 in B in moldm':
c) Percentage by mass of I2 in the sample.
10-16.0. Na - 23.0, S - 32.0.1 - 127.01
110
Answers: 3
Chemistry, 21.06.2019 18:30, mamasmontoya
For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea
Answers: 2
Chemistry, 22.06.2019 08:00, PrincessKeliah5538
Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
Answers: 1
Chemistry, 22.06.2019 10:00, Cythina2007
The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) β co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) β co2(g) k=1.363Γ10^69 b. 2 h2(g) + o2(g) β 2 h2o(g) k=1.389Γ10^80 c. 2co(g) + o2 (g) β 2 co2(g) k=1.477Γ10^90
Answers: 1
14. As a solution containing 158 g dm of Nas,
dm
B was obtained by dissolving 9.0 g of an imp...
B was obtained by dissolving 9.0 g of an imp...
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