using phenolphthalein as indicator. The titration was repeated several times and the mean titre was 18.85cm3 . (a) Describe how the 250.0 cm3 of MOH standard solution was prepared.  (b) (i) Calculate the molar mass of MOH.  (ii) Determine what M is.  (Relative atomi

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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A metal M forms a water-soluble hydroxide with a chemical formula of MOH. To determine what
M is, a student prepared 250.0 cm3 of MOH standard solution by dissolving 1.17 g of MOH in distilled water. Then the student titrated 25.0 cm3
of the solution with 0.055 M H2SO4(aq) using
phenolphthalein as indicator. The titration was repeated several times and the mean titre was 18.85cm3
.
(a) Describe how the 250.0 cm3 of MOH standard solution was prepared. 
(b) (i) Calculate the molar mass of MOH. 
(ii) Determine what M is. 
(Relative atomic masses: H = 1.0, O = 16.0)

 

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