矿物酸和有机酸的区别
酸是具有酸性特征的有机物质。酸也是一种可以与碱反应生成盐和水的化学物质。强酸和弱酸是两种主要的酸。根据它们的化学组成,酸也可以分为无机酸或有机酸。无机酸和有机酸的主要区别在于,无机酸是由各种化学元素组合组成的无机化合物,而有机酸是主要由碳和氢原子组成的有机分子。
什么是矿物酸?
Mineral acids, often known as Inorganic acids, are acids produced from inorganic compounds. Inorganic acids are therefore inorganic substances with acidic characteristics.
例如盐酸(HCl)、硫酸(H 2 SO 4 )、氢氟酸(HF)等。
矿物酸的特性:
- 一些无机酸的结构中含有氧原子,而另一些则没有。例如,H 2 SO 4是具有氧原子的无机酸。然而,另一种无机酸 HCN 缺乏氧原子。
- 一些无机酸可能含有碳原子,而另一些则在其化学结构中不含碳(与无机酸不同,有机酸必须由碳组成)。例如,HCN 尽管是无机酸,但具有碳原子。 HCN 不是有机酸,因为与有机化合物不同,它唯一的 CH 键在水中很容易解离为 H +离子和 CN -离子。
- 无机酸极易溶于水,但溶于无机溶剂。
- 大多数无机酸具有极强的腐蚀性。硫酸、盐酸和硝酸是最常见的无机酸。无机酸用于多种工艺,包括有机和无机化合物的合成。然而,这些酸具有极强的腐蚀性。
- 无水形式可以是气态或固态。无机酸酐是可以与水反应形成无机酸的准金属氧化物。硫酸就是一个例子。
什么是有机酸?
Organic acids are organic substances that are acidic in nature. Because they are organic molecules, organic acids must include a carbon atom.
例如苹果酸、柠檬酸、草酸、酒石酸、盐酸等。
有机酸的特性:
- 有机酸具有极强的腐蚀性和毒性。腐蚀性是酸接触的组织的一种毒性。
- 有机酸及其衍生物用于描述范围广泛的物质。它们用于几乎所有类型的化学品生产。因为有机酸基团成员的化学结构不同。乙酸就是一个例子。
- 羧酸的分子式是RCOOH。酸性是由官能团-COOH引起的。该基团的氢原子可以作为 H +离子释放。这是因为氧原子比氢原子包含更多的电子并且更负电。结果,H原子可以容易地与-COOH基团分离。
- 由于其酸性,有机酸的 pH 值小于 7。这些酸有酸味,可以使蓝色石蕊呈红色。有机酸分为两类。
- 强有机酸:强酸完全解离,在水溶液中没有平衡。
- 弱有机酸:弱酸存在于溶液中,与其共轭碱和 H+ 离子保持平衡。由于它们在水中部分离解,大多数有机酸(乙酸)是弱酸。
- 解离后形成的阴离子的稳定性决定了有机酸的强弱。
矿物酸和有机酸的区别
Mineral Acid | Organic Acid | |
1. | Mineral or Inorganic acids are therefore inorganic substances with acidic characteristics. | Organic acids are organic substances that are acidic in nature. |
2. | Mineral Acids are highly corrosive. | Organic Acids are non-corrosive. |
3. | They are derived from an inorganic compound. | They have acidic properties. |
4. | They have a non-biological origin such as mineral sources. | Most organic acids have a biological origin. |
5. | They dissolve well in water. | They dissolve poorly in water. |
6. | They are strong acids. | They are typically weak acids. |
7. | They may or may not have carbon atoms in their structure. | They essentially have carbon atoms in their structure. |
8. | e.g. Hydrochloric acid (HCl), Sulfuric acid (H2SO4), Hydrofluoric acid (HF), etc. | e.g. Malic acid, Citric acid, Oxalic acid, Tartaric acid, Hydrochloric acid, etc. |
示例问题
问题 1:定义酸、碱和盐。
回答:
- Acid: An acid is defined as a substance that causes a sour taste in water, turns blue litmus red, and neutralises bases.
- Base: If a substance’s aqueous solution tastes bitter, turns red litmus blue, or neutralises acids, it is referred to as a base.
- Salt: Salt is a non-reactive substance whose aqueous solution has no effect on litmus.
问题 2:识别以下酸:番茄、醋和罗望子。
回答:
- Oxalic acid
- Acetic acid
- Tartaric acid
问题 3:解释抗酸剂的工作原理。
回答:
Hyperacidity is caused by an excess of hydrochloric acid in the stomach. Antacid is a basic substance. It neutralises excess acid and relieves pain caused by hyperacidity.
问题四:为什么酸味物质能有效清洁失去光泽的器皿?
回答:
Sour substances usually contain some form of acid. Metal oxide has formed a coating on tarnished vessels. As a result, this acid of sour substance neutralises metal oxide or base, i.e. ionizable H+ in acid is replaced by metal ion forming salt and water that can be easily removed, thereby cleaning the vessel.
问题5:下列哪些是无机酸?
硝酸、柑橘酸、甲酸、盐酸。
回答:
A mineral acid (or inorganic acid) is a type of acid that is derived from one or more inorganic compounds. When mineral acids are dissolved in water, they produce hydrogen ions and conjugate base ions. As a result, nitric and hydrochloric acids are mineral acids.