are the following true for the element gallium? if they are false make them true.
oxide more basic than Al203
oxide less basic than Mg(OH)2
hydroxide soluble in acid
hydroxide soluble in base
sulfide precipitates with H2S
sulfide not soluble in (NH4)2S
will form EaCl3, Ea2S3, and alum
EaCl3, Ea2S3, and alum soluble
will be discovered by spectrum
are the following true for the element scandium? if they are false make them true.
EbCl3 less volatile than AlCl3
will form Eb2O3
density of Eb2O3 = 3.5 g/cm3
ocide more basic than Al2O3
oxide less basic than Y2O3
oxide less basic than Mg(OH)2
You can get much of this information from the
1. periodic table (www.webelements.com)or
2. by going to www.google.com and typing in the name of the compound or
3. reviewing the periodicity of the periodic table in your text/workbook.
For example, EaCl3 would be translated to GaCl3 (it's actually present as Ga2Cl6), Ea2S3 would be translated to Ga2S3. etc.
oxide more basic than Al203
oxide less basic than Mg(OH)2
hydroxide soluble in acid yes
hydroxide soluble in base yes
sulfide precipitates with H2S yes
sulfide not soluble in (NH4)2S yes
will form EaCl3, Ea2S3, and alum
EaCl3, Ea2S3, and alum soluble
will be discovered by spectrum yes
I typed in density scandium oxide and found a density (first article) of 3.86 g/cc and not the 3.5 listed).
are the following true for the element scandium? if they are false make them true.
EbCl3 less volatile than AlCl3 You would want this to read ScCl3 and you can look up the boiling point (the volatility) of ScCl3 and AlCl3 on google.)
will form Eb2O3 Sc2O3
density of Eb2O3 = 3.5 g/cm3 3.86 g/cc
ocide more basic than Al2O3
oxide less basic than Y2O3
oxide less basic than Mg(OH)2
I hope this gets you started.
To determine the accuracy of the statements about the elements gallium and scandium, we will need to refer to their respective properties and characteristics.
For gallium:
1. "Oxide more basic than Al203" - False:
To verify this statement, we need to compare the basicity of gallium oxide (Ga2O3) with that of aluminum oxide (Al2O3). Ga2O3 is an amphoteric oxide, meaning it can act as both acidic and basic. In contrast, Al2O3 is primarily amphoteric but tends to show more acidic behavior. Therefore, the statement is false.
2. "Oxide less basic than Mg(OH)2" - True:
To assess this statement, we compare the basicity of Ga2O3 with that of magnesium hydroxide (Mg(OH)2). Mg(OH)2 is a strong base, whereas Ga2O3 is an amphoteric oxide with minimal basic properties. Hence, the statement is true.
3. "Hydroxide soluble in acid" - False:
To confirm if gallium hydroxide (Ga(OH)3) is soluble in acid, we should examine its solubility properties. Unfortunately, Ga(OH)3 is insoluble in most acids, making the statement false.
4. "Hydroxide soluble in base" - True:
Gallium hydroxide (Ga(OH)3) is soluble in strong bases, such as sodium hydroxide (NaOH). Demonstrating basic behavior, Ga(OH)3 dissociates to form Ga3+ cations and hydroxide ions (OH-). Hence, the statement is true.
5. "Sulfide precipitates with H2S" - True:
When gallium ions (Ga3+) come into contact with hydrogen sulfide (H2S), they form gallium sulfide (Ga2S3), which is a brownish-red precipitate. Consequently, the statement is true.
6. "Sulfide not soluble in (NH4)2S" - False:
To assess the solubility of gallium sulfide (Ga2S3) in ammonium sulfide ((NH4)2S), we observe that (NH4)2S is capable of dissolving Ga2S3. Therefore, the statement is false.
7. "Will form EaCl3, Ea2S3, and alum" - True:
Gallium can form gallium chloride (GaNl3), gallium sulfide (Ga2S3), and alum (potassium aluminum sulfate, KAl(SO4)2·12H2O). Hence, the statement is true.
8. "EaCl3, Ea2S3, and alum soluble" - True:
Both gallium chloride (GaCl3) and alum are soluble in water, while gallium sulfide (Ga2S3) is insoluble in water. Consequently, the statement is partially true.
9. "Will be discovered by spectrum" - False:
Determining the discovery of gallium by spectral analysis is inaccurate. Gallium was primarily discovered by chemical isolation through the use of spectroscopy by Paul Emile Lecoq de Boisbaudran. Therefore, the statement is false.
For scandium:
1. "EbCl3 less volatile than AlCl3" - False:
Scandium chloride (ScCl3) is more volatile than aluminum chloride (AlCl3). Consequently, the statement is false.
2. "Will form Eb2O3" - False:
Scandium does not form scandium oxide (Sc2O3). Therefore, the statement is false.
3. "Density of Eb2O3 = 3.5 g/cm3" - False:
Since Sc2O3 does not exist, the statement is false.
4. "Oxide more basic than Al2O3" - False:
Scandium oxide (Sc2O3) is primarily amphoteric, behaving as both acidic and basic. Aluminum oxide (Al2O3) tends to exhibit more acidic behavior. Hence, the statement is false.
5. "Oxide less basic than Y2O3" - False:
Sc2O3 is more basic than yttrium oxide (Y2O3). Therefore, the statement is false.
6. "Oxide less basic than Mg(OH)2" - True:
Sc2O3 is less basic than magnesium hydroxide (Mg(OH)2). Thus, the statement is true.