Skip to main content
Editing a short answer - math & science question by WIRIS
You have permission to :
Edit this question
General
Category
Default for System (16649)
Test-Lidia
Question name
Question text
<p>Con objeto de averiguar la concentración de una disolución acuosa de yodo, se prepara una disolución #mhs M de hidrogenosulfito de sodio. Al tomar 50 ml de la disolución de yodo, se comprueba experimentalmente que el punto final de la reacción (usando como indicador engrudo de almidón) se consigue con #vhs ml de aquella disolución de hidrógenosulfito de sodio. Determinar la concentración de I<sub>2</sub>, expresada en g/l de disolución.</p> <p style="text-align: center;">I<sub>2</sub> + HSO<sub>3</sub><sup>-</sup> -> I<sup>-</sup> + SO<sub>4</sub><sup>-2</sup></p> <p>Dato: masa atómica del yodo = 129.6</p>
Default mark
General feedback
No, case is unimportant
Yes, case must match
Correct answers
You must provide at least one possible answer. The first matching answer will be used to determine the score and feedback. Click the icon next to the answer field to edit the mathematical properties of the answer and the question.
Answer 1
Answer
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
Feedback
Answer 2
Answer
Grade
None
100%
90%
83.33333%
80%
75%
70%
66.66667%
60%
50%
40%
33.33333%
30%
25%
20%
16.66667%
14.28571%
12.5%
11.11111%
10%
5%
Feedback
Settings for multiple tries
Penalty for each incorrect try
100%
50%
33.33333%
25%
20%
10%
0%
Hint 1
Hint text
Hint 2
Hint text
Created / last saved
Created
by
Admin User
on
Monday, 6 August 2018, 3:27 PM
Last saved
by
Admin User
on
Monday, 6 August 2018, 3:27 PM
There are required fields in this form marked
.