2. The colorless solution of an unknown solid turned red litmus blue. No odor was noted upon adding NaOH. A gray-white precipitate formed upon adding AgNO, and a white precipitate formed upon adding Pb(NO,),. The flame test gave a violet color, and bubbles formed after adding HCl. Identify the unknown from the list of possibilities in the Introduction to this experiment. - base

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**Chemical Compounds Classification**

Here is a classification of different chemical compounds divided into categories:

**Acidic Compounds**
- NH₄Cl
- ZnCl₂
- Zn(NO₃)₂
- Cu(NO₃)₂
- CuSO₄
- Ni(NO₃)₂
- Fe(NO₃)₃
- CuCl₂
- NH₄Br

**Basic Compounds**
- Na₂CO₃
- K₂CO₃
- (NH₄)₂CO₃
- Na₂HPO₄
- K₂CrO₄
- (NH₄)₂CrO₄

**Halides**
- NH₄Cl
- KI
- KCl
- KBr
- NaI
- NaBr
- NaCl
- CaCl₂
- CaBr₂
- ZnCl₂
- CuCl₂

**Nitrates**
- NaNO₃
- KNO₃
- Ca(NO₃)₂
- Zn(NO₃)₂
- Cu(NO₃)₂
- Fe(NO₃)₃
- Ni(NO₃)₂
- LiNO₃

**Carbonates**
- Na₂CO₃
- K₂CO₃
- (NH₄)₂CO₃

This classification lists the compounds according to their chemical properties, helping in understanding their behavior in different reactions and environments.
Transcribed Image Text:**Chemical Compounds Classification** Here is a classification of different chemical compounds divided into categories: **Acidic Compounds** - NH₄Cl - ZnCl₂ - Zn(NO₃)₂ - Cu(NO₃)₂ - CuSO₄ - Ni(NO₃)₂ - Fe(NO₃)₃ - CuCl₂ - NH₄Br **Basic Compounds** - Na₂CO₃ - K₂CO₃ - (NH₄)₂CO₃ - Na₂HPO₄ - K₂CrO₄ - (NH₄)₂CrO₄ **Halides** - NH₄Cl - KI - KCl - KBr - NaI - NaBr - NaCl - CaCl₂ - CaBr₂ - ZnCl₂ - CuCl₂ **Nitrates** - NaNO₃ - KNO₃ - Ca(NO₃)₂ - Zn(NO₃)₂ - Cu(NO₃)₂ - Fe(NO₃)₃ - Ni(NO₃)₂ - LiNO₃ **Carbonates** - Na₂CO₃ - K₂CO₃ - (NH₄)₂CO₃ This classification lists the compounds according to their chemical properties, helping in understanding their behavior in different reactions and environments.
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**Experiment Analysis: Identification of an Unknown Solid**

2. The colorless solution of an unknown solid turned red litmus blue. No odor was noted upon adding NaOH. A gray-white precipitate formed upon adding AgNO₃, and a white precipitate formed upon adding Pb(NO₃)₂. The flame test gave a violet color, and bubbles formed after adding HCl. Identify the unknown from the list of possibilities in the Introduction to this experiment.

*Note: The litmus turning blue suggests the solution is basic.*

---
Transcribed Image Text:--- **Experiment Analysis: Identification of an Unknown Solid** 2. The colorless solution of an unknown solid turned red litmus blue. No odor was noted upon adding NaOH. A gray-white precipitate formed upon adding AgNO₃, and a white precipitate formed upon adding Pb(NO₃)₂. The flame test gave a violet color, and bubbles formed after adding HCl. Identify the unknown from the list of possibilities in the Introduction to this experiment. *Note: The litmus turning blue suggests the solution is basic.* ---
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