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Mo
Questions and answers by
Mo
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Questions (115)
A sample containing 0.2784 grams of sodium chloride (NaCl) and 0.5486 grams of magnesium chloride (MgCl2). The chloride in the
1 answer
13 views
The role of nitric acid ( HNO3) in gravimetric analysis is:
* 1 point prevent peptizing use as washing ion exchange all of
1 answer
14 views
Calculate the pOH of 0.200 M aqueous NaOH at 25°C.
* 1 point 6 0.699 8 13.3
1 answer
14 views
How many grams of Ba(IO3)2 ( 487g/mol) can be dissolved in 250 ml of water at 25 C? Ksp = 1.57 * 10-9
* 1 point 0.089 g 0.178 g
1 answer
15 views
how many grams needs to the preparation of 1.000 L of 0.0500 M AgNO3 (169.87 g/mol) from the primary-standard-grade solid.
* 1
1 answer
13 views
How many millimoles of solute are contained in 250 ml of a solution that contains 4.20 ppm of CuSO4?
* 1 point 0.00658 mmol 10.0
1 answer
23 views
An acid/base indicator is a weak organic acid or a weak organic base whose undissociated form differs in color from its
1 answer
21 views
The human eye is not very sensitive to color differences in a solution containing a mixture of HIn and In-, particularly when
1 answer
16 views
Calculate the pH of a solution when adding 30.00 mL of 0.1000 M NaOH on 50.00 ml of 0.0500 M HCl with at 25°C.
* 1 point 11.80
1 answer
15 views
The pH of a solution when adding 25.00 mL of 0.001 M NaOH on of 50.00 mL of 0.001 M acetic acid (HOAc) at 25°C is............
*
1 answer
12 views
In titrations curve of a weak acid, at the equivalence point of the solution contains only of
* 1 point The conjugate acid buffer
1 answer
13 views
A 0.750 g sample containing only KCl and NaBr was titrated with 0.1043 M AgNO3 , requiring 42.23 mL to reach the endpoint.
1 answer
23 views
The pH of an aqueous solution that is 3.00% HCl by mass and has a density of 1.015 g/mL?
* 2 points 0.078 4.5 7.8 0.78
1 answer
17 views
Find the pH at each of the following points in the titration of 50 mL of 0.3 M HF with 0.3 M NaOH. The ka value is 6.6×10−4 .
1 answer
12 views
1. Find the pH at each of the following points in the titration of 50 mL of 0.3 M HF with 0.3 M NaOH. The ka value is 6.6×10-4.
1 answer
10 views
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